Caribbean Upside Down Jellyfish (Cassiopea xamachana)
These unique jellyfish rest upside down on sandy bottoms, using their arms to filter-feed while hosting symbiotic algae that provide natural color in shades of white, blue, green, and brown. Native to shallow mangroves, mudflats, and seagrass flats in Florida’s subtropical waters, they rely on high-intensity light for photosynthesis and require daily feedings of zooplankton. Sensitive to water quality changes and incompatible with tank mates, they are best kept in specialized, species-only setups.
Quick Facts
| Category | Detail |
|---|---|
| Care Level | Advanced |
| Temperament | Peaceful |
| Maximum Size | ~6 inches |
FAQ
What kind of lighting do these jellyfish need?
They require high-intensity light for photosynthesis, ideally from a full-spectrum LED or similar source with sufficient intensity.
Can I keep them with other fish or invertebrates?
No, they are incompatible with tank mates due to their sensitivity and feeding habits. They should be kept in a species-only setup.
How often should I feed them?
They require daily feedings of zooplankton or similar small, live food sources.
Adam Poole –
The jellyfish looks stunning and stays calm in the tank. I’ve had it for three months and it’s always resting upside down with vibrant algae colors. Only issue is it needs a lot of light and daily feeding, which requires planning.
Simon Pullman –
Beautiful and peaceful. I was worried about water quality, but after adjusting my filtration and monitoring parameters, it’s thriving. The colors are natural and it doesn’t disturb other tank elements.
Dorothy Bond –
It’s a unique addition to the tank. I had to set up a dedicated area with strong lighting and daily feeding. It’s not for beginners, but the visual appeal is worth it.