What do Healthy Jellyfish Look Like?

Jellyfish are strange and very foreign creatures. They’re often compared to alien spacecraft, and deservingly so. Unfortunately, these enigmatic creatures don’t have brains or mouths to tell us when they’re upset. As jellyfish guardians, we have to be able to tell the difference between a healthy jellyfish and a sick one.

For this post, we’re going to be using the Moon Jellyfish for all of our examples. Other species may vary slightly, but should be very similar.

What does a healthy jellyfish look like?

A healthy jellyfish should have an even, round bell. Their bodies should be fairly thick, and smooth. A happy moon Jellyfish will have hundreds of tiny fringe tentacles at the edge of the bell, and four mouth arms in the center. It should pulse once every few seconds.

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In the above photo, notice how there are tons of long, hair like tentacles at the edge of the bell. These “fringe tentacles” are a good indicator of health. They should be long, relaxed and flow smoothly as the jellyfish pulses. They do tend to retract these while eating, so don’t be alarmed if they temporarily disappear!

Also notice the width of the bell. This is exactly how wide a healthy Moon Jelly should be. Thinner ones are less nourished, and may not be getting enough nutrition. IMG_1013.jpg

Note that the bells are round and very smooth. The jellies maintain a sort of half circle form. They aren’t thin like plates, but also aren’t balled up into a sphere. Both extremes are bad signs.

We hope this post can be used as a reference guide for your own jellies at home. Stay tuned, as our next post will be on common jellyfish ills and ails.

At the Jellyfish warehouse, we put the highest level of effort and research to create happy and healthy jellyfish for the home aquarium. You can purchase your own here: Jellyfish Warehouse

My Jellyfish Has Holes in it: How to Fix

Jellyfish are 95-97% water. Naturally, they are quite delicate. If they are not treated well or handled properly, they can develop rips or holes in their bells. Lets explore the most common reasons for holes, and how to fix them.

Shipping damages: This is one of the more common ways you may experience jellyfish with holes. Shipping can sometimes be stressful on jellyfish. Improper packing of jellyfish can make this worse. Your jellyfish should arrive bagged with no air or bubbles in the bags. The reason for this is that the air will break up into bubbles and get trapped in the jellyfishes’ bell. The bubbles will force their way out, creating holes. If your jellyfish arrive with holes in them, contact the company you purchased them from, and let them know what happened. At the Jellyfish Warehouse, we pack our jellies very carefully, and professionally. All of our jellies are packed with no air, and any small bubbles are removed.

How to fix: Holes caused from shipping should heal rapidly. The cause of the holes has been taken out of the equation, so the jellies should be able to heal in their new home. Feed them every day, or even twice a day to encourage repair. Jellyfish fuse holes closed with surrounding tissue, so don’t be surprised if your jelly looks a little smaller once its healed. Feeding them often will help them grow back to normal size.

Sharp or rough objects in the tank: Jellyfish have very delicate skin, and don’t tolerate sharp or rough objects in their home. This is why most jellyfish tanks are completely empty. It is highly unrecommended to add decorations or rocks direct

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An Atlantic Sea Nettle with a large hole caused by bacteria.

ly in your jellyfish tank.

How to Fix: Remove the culprit item from the tank. The jellyfish should heal quickly after this. Follow similar instructions as above, feeding often.

Dirty tanks/ bacterial infections: Jellyfish like a clean home (don’t we all!). Left over food can sit and rot at the bottom of their tank, leading to build ups of bacteria and other nasty microbes. We recommend you wipe down the inside of your jellyfish tank weekly, and remove any uneaten food. Keep a good schedule of 25-50% water changes once every two weeks.

How to Fix: Do a good cleaning of the jellyfish tank. Wipe down all inside surfaces and remove and debris or detritus. Perform a 50% water change. Then let the jellyfish heal. Feed well, but be sure to remove uneaten food.

Jellyfish have amazing abilities of regeneration and healing. Small holes can often close up in 24-48 hours. These holes do not usually leave scars or signs of injury. Once your jellyfish is healed, it should look like nothing ever happened! Happy jellyfish keeping!

You can purchase your own jellyfish and jellyfish aquarium at The Jellyfish Warehouse

 

Blue Blubber Jellyfish for Sale?

Over the years the Jellyfish Warehouse has sold Blubber Jellyfish (Catostylus mosaicus). They are without a doubt one of the most iconic jellyfish around. With vibrant and varied colors of blue, white, burgundy and black, how could they not stand out? These incredibly active jellies quickly express how they earned their name. Like blobs of blubber, they quickly steam their way around the aquarium, often running into things. They win the hearts of any and all observers. Despite this, they have a dirty secret.

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Blue Blubber Jelly
Blubber Jellies don’t do well in captivity. We have spent countless hours researching and testing ways to try and keep these jellies happy. Our efforts came to no avail. These mesmerizing creatures simply weren’t doing well. Let’s look at some possible reasons they don’t make good jellies to keep. After that, well take a look at some jellies that are proven to thrive in captivity.

  1. These jellies need a ton of space. Blubber Jellies love to race around their tank. Unlike other jellyfish, they prefer open and wide tanks. They should be kept in large tanks, where there is less of a chance they will bump into something.
  2. They consume a ridiculous amount of food. Jellies this active need lots of food to fuel their speedy behavior. Blubber Jellies have really small mouths, and need to be fed live baby brine shrimp and rotifers. They have to be fed several times a day, so they are constantly full of food.
  3. All of them are wild collected. Blubber Jellies don’t breed well in captivity, even under public aquarium care. Because of this, all of the specimens found for sale are collected from the wild. They have a hard time adapting to life in captivity.

Blubber Jellyfish are beautiful and stunning creatures, but they don’t belong in home aquariums. For this reason, the Jellyfish Warehouse has stopped selling Blubber Jellyfish. We offer a wide variety of captive reared jellyfish that do phenomenally well in captivity. Consider some of these instead of Blubber Jellyfish.

Lagoon Jellyfish: The closest in shape and appearance to Blubber Jellies. Lagoon jellies are easy to keep and fun to watch.

Fried Egg Jellyfish: These exotic jellyfish are surprisingly easy to keep and never short of interesting. They’re very ornate and colorful.

Flame and Ice Jellyfish: These two species are closely related and come in orange and white colors, respectively. They’re a hardy species that bounce back quickly.

These jellyfish can be purchased on our website The Jellyfish Warehouse

My Jellyfish is Inside Out: How To Fix

Okay so your jellyfish has suddenly turned inside out. Or maybe it arrived that way. Don’t panic, we can help!

When jellyfish turn inside out they are referred to as inverted, or sometimes everted. This problematic qicwisbcondition is somewhat common. Let’s take a look at what causes it, and what we can do to fix it.

Jellyfish are made of 95-97% water, and the rest is mostly protein. When protein is exposed to extreme or unfavorable conditions, such as heat, they change shape in a process known as denaturing. Think about how frying an egg makes it go from liquid to rubbery. Unfortunately, this very same process happens to jellyfish. The number one cause of inverted jellyfish is too much heat. Every species of jellyfish has an ideal temperature range, and when they slip past it, into the hot end, they risk winding up inverted. Always check your jellyfishes ideal temperature range before purchasing, and make sure your aquarium is at the correct temperature. Some other causes of inversion include: sudden change in salinity (usually too high), pH swings, and ammonia build up. Note that the key element here is speed. Change that happens too quickly can be very bad for your jellyfish.

Jellyfish that are invertphoto-7ed struggle with necessary processes, such as eating. Even if it looks like they are catching food, they are probably not able to disperse the nutrition around the body. A very small percentage of inverted jellyfish will return to their proper shape on their own.

So how do we fix this? Over the years we have come up with a couple of good methods for fixing your inverted jellyfish. Please proceed with caution, and understand that manually handling your jellyfish can help it, or make its condition worse.

 

  1. Changing the salinity: We recommend trying this method first to see if it helps any. This is still based on anecdotal evidence, but it seems to have worked for many jellyfish keepers, including us. You want to bring the salinity up towards the high end of their comfortable salinity range. Before you ask, I know we just said above that high salinity can cause inversion. The idea here is to slowly raise the salinity, and keep it within their acceptable range. If they flip back to normal, you can slowly drop the salinity back to its original level. To change the salinity, we recommend preforming a water change with extra salty water. This will help bring the salinity up gently.
  2. So maybe method #1 hasn’t done anything after a day or two. You may try manually flipping your jellyfish back to normal. Our favorite method of doing this goes as follows: Take your jellyfish * and put two fingers underneath it, right in the center. Begin moving the jellyfish slowly up to the water’s surface. Gently bring the jellyfish just up out of the water, but not all the way. The jelly should collapse back on itself, flipping into the correct shape. Understand
    that this process can be risky for the jellyfish. Only attempt it if other options have not worked, and you feel skilled enough to properly handle it.

Once your jellyfish has been flipped back, it may invert again. This is fairly normal, and some jellies can be very stubborn. You can try flipping it back again, but we have found that these jellies will actually return to their normal shape, once you have manually flipped them a few times. So even if your jellyfish inverts again 30 minutes after you manually flipped it, don’t worry too much.

Jellyfish that have been inverted once in their life tend to be susceptible to inverting again in the future. Just make sure their water quality is good, stable and at the right levels.

 

*Please wear gloves or other protection when handling jellyfish that sting.

 

You can buy your own pet jellyfish and jellyfish aquarium at our online store: Jellyfish Warehouse

 

 

Picture Credits:

 

)https://jellykeeping.files.wordpress.com/2011/07/photo-7.jpg

)http://i.imgur.com/QICwisb.jpg