Moon jellies are see-through, pulsing jellyfish that look amazing in a dark room with coloured lights. They're an exhibit favourite. The one thing to know: they need cold water, and they overheat easily if you put them in a tropical setting.
Temperature
- 9–19 °C
- Set the exhibit to around 13 °C.
If you put moon jellies in a round exhibit at tropical reef temperatures (say 26 °C), you'll get an overheating alarm. Mine dropped to 9% welfare before I noticed. Always set the exhibit temperature first.
Where to keep them
- Moon jellies live in exhibits, including the big round aquatic exhibits.
- A jellyfish dark room is a classic aquarium feature. Use dark walls, low light and coloured exhibit lighting so the jellies glow.
Overpopulation
Moon jellies multiply quickly. A shoal forms, and before long you'll see "Habitat is too small". When that happens:
- Open the exhibit.
- Quick release a few jellies for conservation credits.
- Keep the group at a size the exhibit can handle.
Tips
- Don't mix moon jellies with tropical fish in the same exhibit. Their temperature ranges don't overlap.
- Group several jelly exhibits in one room. It becomes one of the most photographed spots in the aquarium.
- The Moon Jelly Donuts food stall is a fun shop to put near the jellyfish room.