Jellyfish or jelliesare softbodied, free-swimming sea-going creatures with a coagulated umbrella-formed chime and trailing limbs. The ringer can throb to procure impetus and motion. The appendages might be used to catch prey or safeguard against predators by radiating poisons in an agonizing sting. Jellyfish species are grouped in the subphylum Medusozoa which makes up a noteworthy piece of the phylum Cnidaria, despite the fact that not all Medusozoa species are thought to be jellyfish.
Jellyfish are found in each sea, from the surface to the remote ocean. Scyphozoans (the "genuine jellyfish") are only marine, and a few hydrozoans with a comparable appearance live in freshwater. Vast, regularly bright, jellyfish are normal in waterfront zones around the world. Jellyfish have meandered the oceans for no less than 500 million years, and perhaps 700 million years or all the more, making them the most established multi-organ creature.