How to Care For Your Pet Mangrove Box Jellyfish

Box Jelly 250
An adult Mangrove Box Jellyfish.

A popular jellyfish we offer are Mangrove Box Jellyfish. These odd little jellies are both entertaining and mysterious. They originally come from the Caribbean and surrounding areas.

Mangrove Box Jellyfish only get about 1″ in bell length and 2-3″ total length. This makes them perfect for small home jellyfish aquariums. They rapidly dart around the aquarium, making them instantly captivating.

What do they eat? In the wild, Mangrove Box Jellyfish eat live copepods, or plankton. When we first collected these jellies, this was an issue. They didn’t like to eat anything but wild plankton. We were able to selectively breed these jellyfish to produce a line that readily accept live Baby Brine shrimp. This may be easy enough for some and too much of a hassle for others.

IMG_2593
A day old Mangrove Box Jellyfish. They later grow three tentacles on each corner.

What parameters should the water be? Mangrove Box Jellyfish should be kept at a salinity of 1.020 – 1.024 (27-32ppm) and a temperature of 77-80 F. These jellies prefer fairly strong flow, but seem to enjoy a variety of aquariums. We recommend they be kept in a Cnidarium Nano or an Orbit 20. Fairly tolerant of less than perfect water quality and conditions, these make a good beginner jellyfish. They should be housed with other Mangrove Box Jellyfish only.

Do they sting? Box Jelly immediately makes people think of the lethal Australian Box Jellies. Luckily, Mangrove Box Jellyfish are an entirely different story. They have a small, non lethal sting. Some report no feeling at all, whereas others report minor irritation or stings. As usual, we recommend you exercise caution when handling these jellies. If you know you have sensitive skin, you may be more prone to jellyfish stings.

 

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

IMG_9697Check out our video on Mangrove Box Jellyfish! 

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Will my Jellyfish Outgrow its Aquarium?

We get this question quite frequently, and there is a lot of misinformation floating around the web. It’s understandable to be concerned when you buy a Moon Jellyfish for a desktop sized aquarium and then find out they can reach up to 15″ in diameter. Do not fear, science is here!

In short, your jellyfish will not outgrow your aquarium, and here’s why:

Jellyfish have two natural adaptations that make them excellent candidates for home aquariums.

  1. Jellyfish grow to fit their environment. Jellyfish are able to grow until they reach a happy and comfortable size in an aquarium. Once they reach this point, they either stop growing or slow down massively.  This is why we offer different sizes of jellyfish. You can buy a small jellyfish, for your smaller sized tank.
  2. They alter their size based on how much food they have. In nature, jellyfish essentially bump into their food. A lot of their movement is based on tides and flow. So food isn’t always available to them. They have a clever adaptation which allows them to grow or shrink depending on how much food is available. Rather than starve to death, they decrease in size. So as a jellyfish owner, you can help moderate there size by controlling how much food you give your jellyfish.

Don’t just take it from us, worldwide jellyfish expert Dr. Lisa Gershwin says “If they start growing too big, just don’t feed them for awhile until they are back down to a convenient size, then start feeding again. It’s not cruel, it’s how they work. It’s called degrowth and regrowth, and it doesn’t hurt them.”

Tiny Nomuras
Juvenile Nomura’s jellyfish, perfectly sized for a home aquarium!
Large Nomuras
A full grown Nomura’s jellyfish. “Honey, I think we should buy a bigger tank!”

As you can see above, some jellyfish can get quite large. But when bred in captivity, the jellies can be purchased a smaller size, and kept that way. Just like your very own bonsai jellyfish!

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

Picture credits to

http://museumvictoria.com.au/images/thumbnail.jpg?i=/pages/26113/webMEDUSES-Galatee-v2.jpg&resizewidth=true&w=475&h=283

http://japanesejellies.blogspot.com/search?updated-min=2015-01-01T00:00:00-08:00&updated-max=2016-01-01T00:00:00-08:00&max-results=2