JELLYFISH

Jellyfish or jellies, are jellylike invertebrates in the phylum Cnidaria. They are free swimming animals that contain an umbrella like gelatinous bell with trailing stinging tenticals. Jellyfish are found world wide, from shallow waters to the deepest depths. Jellyfish roamed the oceans for about 500 million years, possibly 700 million years, being the longest lived multi-organ animal.  


The popular English name for these creatures are jellyfish, and other creatures that have a gelatinous body, like comb jellies (or Ctenophores)