Moon Jellyfish (Aurelia Aurita) FAQ

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Moon Jellyfish (Aurelia Aurita) FAQ

Postby Cubic » 07 Apr 2012, 04:50

Moon Jellyfish (Aurelia Aurita) Frequently Asked Questions

Q. What do moon jellyfish eat in the wild?
A. In the wild moon jellyfish feed on a range of organisms known as zooplankton. They will eat molluscs, crustaceans, tunicate larvae, rotifers, young polychaetes, protozoans, diatoms, fish eggs, and a whole range of other small organisms.

Q. What do you feed moon jellyfish in a home aquarium?
A. In an aquarium we feed moon jellyfish a range of small particle size foods including copepods, rotifers and live or frozen artemia nauplii (baby brine shrimp). We are constantly experimenting with new types of food with varying levels of success. Being filter feeders jellyfish will catch most small particle foods and move them into their stomachs, this does not necessarily mean they will be able to break the food down and extract energy from it. We have tried everything from zoo plankton to dried and crushed krill and even fish flake.

We have found live, enriched, artemia nauplii is by far the best food for moon jellyfish. An important point to note when experimenting with foods for moon jellyfish is that some foods (often the more acidic ones) can actually damage your jellies. Our advice is to be careful and only feed new foods in small amounts then wait for at least 24 hours to observe how your jellies react.

Q. How long do moon jellyfish live?
A. Moon Jellyfish live for around one year in the wild but have been known to live considerably longer in captivity.

Q. Do moon jellyfish sting?
A. Moon Jellyfish do have a sting but it is too weak to have any effect on humans.

Q. Where are moon jellyfish from?
A. Moon jellies can be found throughout most of the world’s oceans. They are often found in coastal areas, sometimes in harbors and estuaries.

Q. At what temperature should I keep my moon jellyfish??
A. Moon jellyfish can be found living in areas with temperatures ranging from 6 °C to 31 °C so you will need to find out where your moon jellyfish came from. If they came from tropical/sub-tropical areas like Taiwan or Hawaii they can be kept at room temperature, if they come from cold areas like the seas around Japan you should consider a chiller.
We recommend keeping moon jellyfish at 18°C to 22°C (keeping them at heigher temperatures means they will grow quicker but there lifespan may be shorter.

Q. Where can I buy a moon jellyfish and how much do they cost?
A. This really depends where you live but if you are lucky enough enough to live in a coastal area you may be able to find moon jellyfish close to shore. They are often seen in large numbers in harbours and bays where you can collect them your self with a bucket!

How big do moon jellyfish grow?
A. Moon jellyfish can grow as large as 30cm (12") when well fed. You can control the size of a moon jellyfish by increasing or decreasing food availability, if a jellyfish doesn't get enough food it will maintain the same size or shrink. As soon as the food level is increased the jellyfish will start to grow again.
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