Jellyfish, also called sea jellyfish, is a type of jellyfish that belongs to the gelatinous members of the subphylum Medusozoa, which forms the main part of the Cnidarian phylum.
Jellyfish are free-swimming aquatic animals, although a few use poles to float on the surface rather than being mobile.
They have a large umbrella-shaped mesoglea body, known as a bell, and several tentacles on the back.
With moving chatter, the bell can provide the impetus needed for open water travel.
The tentacles have colored cells and can be used to catch prey or protect predators. Jellyfish have a complex life cycle, and jellyfish often have, which produces planula larvae.
These tend to spread throughout the body and form a polyp system that is usually localized and may include male and female growths before reaching maturity.
Jellyfish are found all over the world, from surface water to deep water. Scyphozoans (“true jellyfish”) are exclusively aquatic, but some hydrozoans seem to live in fresh water.
Large and often colorful jellyfish are found in beaches around the world.
