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May 29, 2009

What has no heart, bones, eyes or brain, is made up of 95% water, and yet is still a remarkably efficient ocean predator?

The answer is the jellyfish.

This unusual creature is not actually a fish, but an invertebrate from the Coelenterate phylum (the same phylum as coral, also called Cnidaria). It comprises a ‘bell’, made up of a jelly-like substance, as well as tentacles and oral arms (sometimes called ‘flaps’), which are used to eat its prey. The bell is called a medusa, because it resembles the Gorgon Medusa of Greek mythology, with its hair of writhing snakes.

Posted by Ghost of a flea at May 29, 2009 09:21 AM