[3] They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, canals, and turtle grass flats in Florida, the Caribbean and Micronesia.

The medusa usually lives upside-down on the sea floor in shallow areas, which has earned them their common name.

These jellyfish partake in a symbiotic relationship with photosynthetic dinoflagellates and therefore, must lie upside-down in areas with sufficient light penetration to fuel their energy source.

[7][8] The stings, appearing in the form of a red rash-like skin irritation, are known for being extraordinarily itchy.

Sometimes this jellyfish is picked up by the crab Dorippe frascone and carried on its back[citation needed].