Cnidaria

thumb|Spotted jelly|Spotted jellies swimming in a Tokyo aquarium Jellyfish, also known as sea jellies or simply jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of mesoglea, known as the bell, and a collection of trailing tentacles on the underside.

thumb|Chrysaora fuscescens|Pacific sea nettles, Chrysaora fuscescens

flesh from jellyfish