Jellyfish Saves Diver

26 July, 2006

Jellyfish are any planktonic marine member of a group of invertebrate animals composed of about 200 described species of the class Scyphozoa (phylum Cnidaria) or of the class Cubozoa, which was formerly considered an order of Scyphozoa. The term, jellyfish, is also often used in referring to certain other cnidarians that have a medusoid (saucer- or bell-shaped) body form, such as hydromedusae, the siphonophores (including even the Portuguese man-of-war which technically is not a jellyfish but a pelagic colonial hydroid or hydrozoan), as well as unrelated forms such as salps and comb jellies.