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Jellyfish
Jellyfish (also known as jellies or sea jellies) are free-swimming members of the phylum Cnidaria. They have several different morphologies that represent several different cnidarian classes including the Scyphozoa (over 200 species), Staurozoa (about 50 species), Cubozoa (about 20 species), and Hydrozoa (about 1000-1500 species that make jellyfish and many more that do not).[1][2] They are well represented in the fossil record.
References
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- ^ Marques, A.C. and A. G. Collins, 2004. Cladistic analysis of Medusozoa and cnidarian evolution. Invertebrate Biology 123: 23-42.
- ^ Kramp, P.L. 1961. Synopsis of the Medusae of the World. Journal of the Marine Biological Association of the United Kingdom 40: 1-469 and many subsequent descriptions of new species.
