The mangrove jellyfish has what alternative name?

Cassiopea xamachana or Mangrove Jellyfish is named after the habitat it’s normally found in, at the roots of the mangrove plants in the Caribbean, southern Gulf of Mexico and similar warm, tropical waters. As they often settle upside down in shallow and muddy waters, they are also known as the Upside Down Jellyfish. Looking at them for the first time, they resemble for the most part sea anemones or greenish blue flowers resting on the sea or ocean floor. This appearance works in favor of the Jellyfish as it is an effective camouflage and protection from potential predators.

Generally found in large swarms, the mangrove jellyfish settles on the muddy surface of the waterbed. Sighting an individual jellyfish is extremely rare. The swarm rarely rises to the surface unless the water suddenly gets disturbed in which case the whole swarm rises as one, stays afloat for a brief period of time and then goes back down to the water bottom.