Sea Anemones, Actiniaria
Sea Anemones, Actiniaria
AnimalWorld.com
Description:
Anemones are invertebrates, as are 95% of the earth's creatures. Most invertebrates are insects. The name Cnidaria (with a silent "c") refers to the cnidae, or nematocysts, which all Cnidarians have. The phylum Cnidaria includes anemones, corals, jellyfish, and hydras. The 'cnidae' are the stinging cells which provide the animals a means of capturing prey and/or defending themselves with a painful sting. Another name for Cnidarians is Coelenterata (pronounced "se-len-ter-a'-ta') which refers to the single body cavity that serves as stomach, lung, intestine, and everything else! There is only one opening into this cavity, the mouth, through which everything passes in and out. The mouth is surrounded by several or many tentacles which contain the nematocysts (cnidae) at their tips. Sea anemones, being members of the Class Anthozoa, along with hard and soft corals, are benthic, which means they are attached to rocks or the sea floor. Anemones in the aquarium though, will often move around until they find a place that they like and then stay put!
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