The capuchin jellyfish is a coelenterate, blue-green, and its floating sac is not round like ordinary jellyfish, but has two sharp ends and looks like a hat worn by monks. Its floating sac has a luminous membrane crown, which can adjust its direction by itself and float on the water like a sailboat by wind. It is a famous tropical species, accompanied by warm current, which can be used as an indicator of the emergence of warm current.

Cephalotaxus is a genus of Cephalotaxus of Leeches, and it is not a jellyfish in the usual sense. Jellyfish is a kind of lower coelenterate, which belongs to the phylum Coelenterata and the class Cephalopoda, while Cephalopoda belongs to the class Hydrozoa, and its true body is a collection of Hydrozoa. The light blue transparent sac-shaped pneumatophore floating on the water is generally 6-30cm long, with a sharp front end and a blunt back end, and the top is hunched like a back peak, which is quite similar to the hat of a monk (that is, a monk) who has become a monk. Therefore, it is named the Sangha jellyfish. Its floating sac has a luminous membrane crown, which can adjust its direction by itself and float on the water surface with the help of wind.

The shape of jellyfish is similar to jellyfish, but they are actually a kind of tube jellyfish, and they are a kind of planktonic coelenterates that live in groups for life. In the group of jellyfish, one jellyfish forms a floating sac, and the others are responsible for stabbing, digesting prey and breeding. When they float on the water, their toxic tentacles hang down underwater, sometimes reaching 20 meters deep into the sea. According to research, their tentacles can entangle and kill humans.