Their color is variable, often they are dull brown but they can be colorful. While not very dangerous, this jellyfish produces a mucus which is quite irritating to human skin. In one life span, a jellyfish can have up to 1,000,00 eggs, but not all survive. It also has the ability to capture prey by excreting a mucus / slime in which plankton is trapped and consumed. This jellyfish uses light to photosynthesise and is thus fed by algae inside the body. the Team of the research laboratory of the U.S. Navy studied of a species Cassiopea xamachana (in the English language they are also called upside-down jellyfish, loosely translated as “upside down jellyfish”, because they do not like to swim, preferring to sink to the bottom and lay on the dome, pumping the water movement of the tentacles). is one of the easiest species of jellyfish as long as you can provide a good full spectrum light for their photosynthesis. They say they can be kept in a normal tank and do not need the round jellyfish tanks. Upside down jellyfish (Cassiopea sp.) I am thinking about trying this just cause they look cool. Not sure if this is the right place for this but I have a question. This jellyfish, which is frequently found around the coasts of Turkey, Italy, and Malta, is easily identified owing to the fact that it appears to swim “upside down” (tentacles facing upward, mouth on the bottom). These jellyfish live in the intertidal area on sandy bottoms, mud flats and in mangroves. Unlike most jellyfish that swim with their bells pointed up, these so-called upside-down jellyfish spend most of their time with their bells resting on the seafloor of shallow, still coastal waters. They are the jellyfish that ignores the rules, push the boundaries and decide the best thing to do is plonk themselves upside down on the sand and stay there. They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, canals, and turtle grass flats in Florida, and the Caribbean and Micronesia.The medusa usually lives upside-down on the bottom, which has earned them the common name. I found a place here in florda that sells them. They are usually found on the bottom with their mouth upwards, hence the name upside-down jellyfish. When it needs to move around, the upside-down jelly fish can be seen swimming right-side up, pulsating its bell for propulsion like any regular jellyfish. Upside-down jellyfish use symbiotic algae to get energy from sunlight, so it's possible cassiosomes get energy from algae too, although this has not been tested, said Collins. The group Rhizostomeae is found mainly in shallow tropical to subtropical seas in the Indo-Pacific region, but members of the genus Rhizostoma, also called football… Here is a photo of my Upside Down Jelly fish (Cassiopeia sp.) The embryo develops in “brood pouches” on the arms of the mouth structure inside the female jellyfish.v The larvae (planula) swim out of the mouth of the mother and attach on the bottom of the ocean floor where they then go through the next stages of life. The researchers suspect that cassiosomes help defend upside-down jellyfish from predators. Cassiopea (upside-down jellyfish) is a genus of true jellyfish and the only members of the family Cassiopeidae. Species of Cassiopea, the upside-down jellyfish, however, swim infrequently and sit inverted in tropical shallows, exposing their photosynthetic symbiotic algae to sunlight. They may not be the one you imagine when you think of jellyfish, as their life style is more like sea anemone, … The upside-down jellyfish gets its name, however, because a lot of the time it can be found resting on the bottom with its tentacles pointing upwards towards the water’s surface. 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