{"id":7084,"date":"2021-01-04T12:05:17","date_gmt":"2021-01-04T10:05:17","guid":{"rendered":"https:\/\/medusea.es\/information\/happy-jellyfish-handling-potential-problems\/"},"modified":"2025-08-05T12:41:05","modified_gmt":"2025-08-05T10:41:05","slug":"happy-jellyfish-handling-potential-problems","status":"publish","type":"page","link":"https:\/\/medusea.es\/en\/information\/happy-jellyfish-handling-potential-problems\/","title":{"rendered":"Happy Jellyfish: Handling Potential Problems"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7084\" class=\"elementor elementor-7084 elementor-3073\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5eb22f5a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5eb22f5a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4fbec043\" data-id=\"4fbec043\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7e0338e7 elementor-widget elementor-widget-breadcrumbs\" data-id=\"7e0338e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/medusea.es\/en\/home\/\">Inicio<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2125155 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2125155\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e0add0b\" data-id=\"e0add0b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6f852e1 elementor-widget elementor-widget-html\" data-id=\"6f852e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<script> \njQuery(document).ready(function($) { \nvar delay = 100; setTimeout(function() { \n$('.elementor-tab-title').removeClass('elementor-active');\n $('.elementor-tab-content').css('display', 'none'); }, delay); \n}); \n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67d2978 elementor-widget-divider--separator-type-pattern elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"67d2978\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\" style=\"--divider-pattern-url: url(&quot;data:image\/svg+xml,%3Csvg xmlns=&#039;http:\/\/www.w3.org\/2000\/svg&#039; preserveAspectRatio=&#039;none&#039; overflow=&#039;visible&#039; height=&#039;100%&#039; viewBox=&#039;0 0 24 24&#039; fill=&#039;none&#039; stroke=&#039;black&#039; stroke-width=&#039;1&#039; stroke-linecap=&#039;square&#039; stroke-miterlimit=&#039;10&#039;%3E%3Cpath d=&#039;M0,6c6,0,0.9,11.1,6.9,11.1S18,6,24,6&#039;\/%3E%3C\/svg%3E&quot;);\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-657583e elementor-widget elementor-widget-text-editor\" data-id=\"657583e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Select a potential problem to understand:<strong> Why it happens<\/strong> and <strong>How to solve it<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-77545fb elementor-widget elementor-widget-accordion\" data-id=\"77545fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1251\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1251\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">White Bumps on Tentacles<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1251\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1251\"><p><span style=\"font-weight: 400;\">The jellyfish\u2019s tentacles are the hair-like filaments located along the edge of the bell (umbrella). These contain the stinging cells jellyfish use to immobilize prey. Sometimes, white bumps appear on the tentacles\u2014this is usually due to tangled tentacles. <\/span><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This mostly occurs in tanks with low water flow, which causes the tentacles to become tangled. It can also happen when jellyfish frequently bump into the tank walls or each other. Fortunately, this condition is reversible if corrected in time.  <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Slightly increase the water flow speed according to the needs of the jellyfish you are keeping.<br \/>The larger the jellyfish and the more numerous they are, the stronger the flow should be to ensure proper movement and avoid tangling.  <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1252\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1252\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Inverted Jellyfish or Goblet-Shaped Jellyfish<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1252\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1252\"><p><span style=\"font-weight: 400;\">This condition occurs when the jellyfish inverts the edge of its bell upward, leaving the oral arms hanging down\u2014giving it a goblet-like shape. <\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-3007 size-full\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_invertida.jpg\" alt=\"Inverted Jellyfish\" width=\"520\" height=\"663\" srcset=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_invertida.jpg 520w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_invertida-118x150.jpg 118w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_invertida-300x383.jpg 300w\" sizes=\"(max-width: 520px) 100vw, 520px\" \/><\/span><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Malnutrition:<br \/>A jellyfish that is not properly fed becomes thinner and is more prone to inversion. This usually gives warning signs\u2014if it begins to flatten like a plate and shows reduced movement, it should be monitored closely. <\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sudden changes in temperature or salinity:<br \/>Abrupt shifts can cause osmotic shock, affecting the proteins that support jellyfish tissue. Take special care during acclimation and water changes.  <\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Insufficient water flow:<br \/>Low current may cause jellyfish to sink and stay on the bottom, leading to damage to the bell. <\/span><\/li>\n<\/ul>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This condition is difficult to reverse, so it\u2019s important to act early.<br \/>If you notice the jellyfish flattening or becoming inactive, check water parameters using a test kit and adjust the water flow accordingly. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">In more severe cases, you may try to manually revert the bell shape.<br \/>Gently hold the jellyfish in your hands and use your fingers to unfold the umbrella. This maneuver often needs to be repeated several times.  <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1253\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1253\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Broken Jellyfish - Mechanical damage<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1253\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1253\"><p><img decoding=\"async\" class=\"alignnone size-full wp-image-3008\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_dan%CC%83os_mecanicos.jpg\" alt=\"Jellyfish Mechanical damage\" width=\"900\" height=\"1200\"><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Mechanical damage can occur if there is something inside the aquarium constantly rubbing against the jellyfish. This may result in visible tears or missing tissue.<br \/>Another common cause is suction injuries\u2014when a jellyfish gets pulled into the filter intake. In these cases, you may notice lines or holes shaped like the overflow grid.   <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Damage can also happen accidentally during cleaning, such as if a jellyfish is unintentionally sucked up by the siphon or feeding pipette, causing tissue tears. <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">If the damage is not too severe, and the jellyfish is kept in a healthy, stable environment, it is often capable of regenerating and healing itself naturally. <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1254\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1254\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Broken Jellyfish: Damage Caused by Poor Water Quality<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1254\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1254\"><p><strong>Why It Happens<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">If you observe multiple holes on the top of the jellyfish\u2019s bell, it may be due to a spike in ammonia levels. <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Perform an ammonia test.<br \/>If levels are high:<br \/>Carry out a water change immediately.<br \/>You may also add an ammonia neutralizer after the water change.<br \/>Reduce feeding in the following days and monitor the jellyfish closely.<br \/>Retest ammonia after 3 days. If still high, repeat the water change.<br \/>If water parameters return to normal, the jellyfish should recover naturally.<br \/>However, if the jellyfish begins to disintegrate, the situation becomes critical and often irreversible.    <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1255\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1255\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Microholes or a Large Hole<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1255\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1255\"><p><img decoding=\"async\" class=\"alignleft wp-image-3009 size-medium\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_agujeros-225x300.jpg\" alt=\"Holes in Jellyfish\" width=\"225\" height=\"300\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3010\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/medusa_agujero_central-225x300.jpg\" alt=\"Jellyfish with a Central Hole\" width=\"225\" height=\"300\"><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Bubbles and microbubbles are extremely harmful to jellyfish. They can become trapped beneath the bell, or worse, ingested if mistaken for food.<br \/>As bubbles naturally rise to the surface, they can tear through the jellyfish&#8217;s tissue, creating holes.  <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Prevent bubble formation in the area where the jellyfish are housed.<br \/>If bubbles are already present and trapped:<br \/>Gently coax the bubbles out by stroking the jellyfish or using a pipette to help release them.<br \/>Always maintain proper water flow and avoid aeration systems that generate microbubbles near jellyfish.  <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1256\" class=\"elementor-tab-title\" data-tab=\"6\" role=\"button\" aria-controls=\"elementor-tab-content-1256\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Broken Jellyfish: Damage from Poor Food Quality<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1256\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"6\" role=\"region\" aria-labelledby=\"elementor-tab-title-1256\"><p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">A large hole may appear above the stomachs, sometimes accompanied by visible internal damage. This often occurs when the jellyfish have been fed spoiled or overly acidic food, which can cause ulcerations in their tissue.  <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Only feed jellyfish with fresh, high-quality food.<br \/>Never use food that shows signs of spoilage.<br \/>Keep food refrigerated, and only remove the portion you&#8217;re going to use.<br \/>If the jellyfish lives in a clean, stable environment, it may recover over time.   <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1257\" class=\"elementor-tab-title\" data-tab=\"7\" role=\"button\" aria-controls=\"elementor-tab-content-1257\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Listless Jellyfish with Drooping Oral Arms<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1257\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"7\" role=\"region\" aria-labelledby=\"elementor-tab-title-1257\"><p><span style=\"font-weight: 400;\">While jellyfish don&#8217;t pulse continuously and do have rest periods, a consistently listless appearance\u2014especially with drooping oral arms and little movement\u2014can indicate an issue. <\/span><\/p>\n<p><strong>Why It Happens<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This inactivity is often linked to malnutrition: the jellyfish may not be receiving enough food, or the food may lack proper nutritional value.<br \/>High water temperature can also worsen the condition, so it&#8217;s important to monitor temperature and use a chiller if necessary.  <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Provide a nutritionally rich and varied diet to help the jellyfish regain strength and resume normal movement.<br \/>Live food, such as Artemia nauplii, is ideal and can be alternated with jellyfish pellets or prepared feeds.  <\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the water temperature is high, install a chiller to maintain an optimal, stable environment and prevent tissue deterioration. <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1258\" class=\"elementor-tab-title\" data-tab=\"8\" role=\"button\" aria-controls=\"elementor-tab-content-1258\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Rounded Jellyfish \u2013 Ball-Shaped Appearance<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1258\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"8\" role=\"region\" aria-labelledby=\"elementor-tab-title-1258\"><p><span style=\"font-weight: 400;\">Jellyfish should move openly, with visible radial canals, a smooth texture, and oral arms gently tucked under the bell.<br \/>When the edge of the bell begins folding inward, forming a ball-like shape, it\u2019s a sign that something is wrong. <\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3011 size-full\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/IMG_20181115_160059-scaled.jpg\" alt=\"Ball-Shaped Jellyfish\" width=\"1920\" height=\"2560\"><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The exact cause is not well understood, especially when it affects only some jellyfish in the same tank, while others appear healthy.<br \/>It could be due to a developmental malformation\u2014a natural percentage of jellyfish do not reach adulthood.<br \/>It may also stem from poor acclimation to the new environment.<br \/>Another possible cause is excessive water flow, which can stress the jellyfish and affect their shape.   <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This condition is very difficult to reverse, so early detection is key.<br \/>If you observe any signs of deformation:<br \/>Immediately test water parameters (pH, salinity, ammonia, etc.).<br \/>Adjust anything out of range to bring conditions back to optimal.<br \/>If flow is too strong, consider reducing water current to avoid further stress. <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1259\" class=\"elementor-tab-title\" data-tab=\"9\" role=\"button\" aria-controls=\"elementor-tab-content-1259\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Jellyfish with Stalled Growth or Shrinking<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1259\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"9\" role=\"region\" aria-labelledby=\"elementor-tab-title-1259\"><p><span style=\"font-weight: 400;\">Jellyfish grow depending on:<br \/>The amount of food they receive<br \/>The size of the aquarium<br \/>The number of tank mates <\/span><\/p>\n<p><span style=\"font-weight: 400;\">With a proper diet and at least one feeding per day, they will grow slowly but steadily.<br \/>To accelerate growth, increase the feeding frequency throughout the day.<br \/>However, sometimes a jellyfish stops growing or even shrinks in size.   <\/span><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Shrinking or stalled growth may be caused by:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High salinity\/density levels<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Elevated nitrate (NO\u2083\u207b) levels<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water flow that is too strong, preventing the jellyfish from pulsing and swimming properly <\/span><\/li>\n<\/ul>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Adjust salinity gradually.<br \/>\u2192 Never pour freshwater directly over the jellyfish or onto the bio-balls of the biological filter.  <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perform water changes (no more than 20%) to reduce nitrate levels.<br \/>\u2192 Repeat every 3 days if necessary until levels normalize.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Adjust water flow to a gentle level, allowing jellyfish to swim freely and pulse comfortably.<br \/>\u2192 This ensures they have enough time to feed and absorb nutrients effectively.<\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-12510\" class=\"elementor-tab-title\" data-tab=\"10\" role=\"button\" aria-controls=\"elementor-tab-content-12510\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">A Tentacle (Oral Arm) Has Fallen Off<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-12510\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"10\" role=\"region\" aria-labelledby=\"elementor-tab-title-12510\"><p><span style=\"font-weight: 400;\">The oral arms of jellyfish should rest gently beneath the bell. However, it&#8217;s possible for one of the arms to detach unexpectedly. <\/span><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The loss of an arm is usually a sign that one of the water parameters is out of balance\u2014most commonly a spike in ammonia (NH\u2083).<br \/>It can also occur from overfeeding, especially if food is placed too directly on the jellyfish. <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">If the issue is an ammonia spike, perform an immediate water change.<br \/>Add Prime (or a similar ammonia neutralizer) to bind toxic compounds. <br \/>Jellyfish are highly resilient creatures\u2014a new arm will grow back soon if the jellyfish is kept in a clean and healthy environment.  <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-12511\" class=\"elementor-tab-title\" data-tab=\"11\" role=\"button\" aria-controls=\"elementor-tab-content-12511\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Yellow Water or Brown Stains in the Aquarium<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-12511\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"11\" role=\"region\" aria-labelledby=\"elementor-tab-title-12511\"><p><span style=\"font-weight: 400;\">Sometimes your jellyfish tank may take on a yellowish tint, or you may notice brown stains on the aquarium walls.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3013\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron.jpg\" alt=\"Brown Aquarium\" width=\"1200\" height=\"1600\" srcset=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron.jpg 1200w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron-113x150.jpg 113w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron-768x1024.jpg 768w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron-1152x1536.jpg 1152w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuario_marron-300x400.jpg 300w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This is usually due to elevated levels of phosphates and nitrates, which promote the growth of algae.<br \/>While not directly harmful to jellyfish, it gives the aquarium a neglected and unattractive appearance. <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Clean the aquarium thoroughly:<br \/>Remove excess food<br \/>Rinse filter sponges with saltwater\u2014preferably water from the tank itself<br \/>Let algae settle, then siphon the substrate<br \/>Address the root cause:<br \/>To prevent recurrence, reduce nitrate and phosphate levels<br \/>Place a pouch of Chemipure Blue Nano in the filter:<br \/>Absorbs excess waste<br \/>Contains activated carbon to clarify water<br \/>In the following days:<br \/>Avoid overfeeding<br \/>Optionally add cleaning bacteria to help maintain balance<br \/>With regular care and proper feeding, your tank will remain clear and visually appealing.    <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-12512\" class=\"elementor-tab-title\" data-tab=\"12\" role=\"button\" aria-controls=\"elementor-tab-content-12512\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-caret-square-down\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-caret-square-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Milky or Cloudy Water<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-12512\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"12\" role=\"region\" aria-labelledby=\"elementor-tab-title-12512\"><p><span style=\"font-weight: 400;\">The aquarium appears white or foggy.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3012\" src=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuarioturbio.jpg\" alt=\"Cloudy Water\" width=\"225\" height=\"300\" srcset=\"https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuarioturbio.jpg 225w, https:\/\/medusea.es\/wp-content\/uploads\/2021\/03\/acuarioturbio-113x150.jpg 113w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<p><strong>Why Does It Happen?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This is typically caused by a bacterial bloom.<br \/>While not immediately harmful to jellyfish, it often results from:<br \/>Overfeeding, which provides excess nutrients for bacteria to multiply rapidly<br \/>Disruption of the nitrogen cycle, which unbalances the tank&#8217;s bacterial population  <\/span><\/p>\n<p><strong>Solution<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Let it run its course \u2014 the bloom often resolves on its own as the system rebalances<br \/>You may perform a water change of no more than 20%<br \/>If the cloudiness persists, repeat the water change after three days<br \/>Avoid overfeeding and monitor water parameters to prevent recurrence. <\/span><\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Select a potential problem to understand: Why it happens and How to solve it White Bumps on Tentacles The jellyfish\u2019s tentacles are the hair-like filaments located along the edge of the bell (umbrella). These contain the stinging cells jellyfish use to immobilize prey. Sometimes, white bumps appear on the tentacles\u2014this is usually due to tangled [&hellip;]<\/p>\n","protected":false},"author":89,"featured_media":5427,"parent":6644,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"sidebar-2","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"enable","ocean_disable_heading":"enable","ocean_post_title":"","ocean_post_subheading":"To keep our jellyfish happy, we must observe them closely and take proper care of them.<br>What can we do when they show signs of injury or distress? ","ocean_post_title_style":"background-image","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"off","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","footnotes":""},"class_list":["post-7084","page","type-page","status-publish","has-post-thumbnail","hentry","entry","has-media","owp-thumbs-layout-horizontal","owp-btn-normal","owp-tabs-layout-horizontal","has-no-thumbnails","has-product-nav","circle-sale"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Happy Jellyfish: Handling Potential Problems - Medusea<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/medusea.es\/en\/information\/happy-jellyfish-handling-potential-problems\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Happy Jellyfish: Handling Potential Problems - Medusea\" \/>\n<meta property=\"og:description\" content=\"Select a potential problem to understand: Why it happens and How to solve it White Bumps on Tentacles The jellyfish\u2019s tentacles are the hair-like filaments located along the edge of the bell (umbrella). These contain the stinging cells jellyfish use to immobilize prey. 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