What is Sea anemone?
{{Automatic taxobox | name = Sea anemones | image = Actiniaria.jpg | image_caption = A selection of sea anemones,<br>painted by [[Giacomo Merculiano]], 1893 | taxon = Actiniaria | subdivision_ranks = Suborders | subdivision = * [[Enthemonae]] * [[Anenthemonae]] | diversity_link = Actiniaria (family list) | diversity = 46 families }} [[File:Common clownfish.jpg|thumbnail|right|A common [[clownfish]] in a sea anemone. The fish lives in a [[symbiosis]] with the anemone]] [[Image:Tomato anemonefish.jpg|thumbnail|right|''Amphiprion melanopus'' anemonefish in a bubble anemone from [[East Timor]].]] '''Sea anemones''' are [[Cnidaria]]n [[animal]]s that live in the [[sea]]. They are [[polyp]]s, one of the basic forms of the [[phylum]]. They are predatory animals, which [[paralysis|paralyse]] their [[prey]] with stinging [[nematocyst]]s. These fire a [[harpoon]]-like structure which delivers a dose of [[neurotoxin]]s. To eat the fish, or [[crustacean]], they move the prey into their stomach, where they are slowly digested.<ref>Ruppert, Edward E; Fox, Richard S; Barnes, Robert D. 2004. Invertebrate Zoology (7th ed). Cengage Learning. pp. 130–132. ISBN 978-81-315-0104-7</ref> Anemones are [[sessile]]. This means they like to stay in one area. They can move very slowly along the bottom. Some types can swim to a new location by using flexing movements. Many species live in [[rock pool|rockpools]] between [[high tide]] and [[low tide]], and on rocky shores generally. Anemones can be found in deep oceans as well, and a few are [[pelagic]].<ref>Goffredo, Stefano; & Dubinsky, Zvy eds. 2016. ''The Cnidaria, past, present and future: the world of Medusa and her sisters''. Springer International Publishing. p. 240. ISBN 978-3-319-31305-4</ref> An anemone has an oral disk on the top of its body. The sea anemone’s mouth and gut are in the middle of the oral disk. The tentacles surround the oral disk. The pedal disc is on the bottom of the sea anemone. Some sea anemones live in [[symbiosis]] with other animals. [[clownfish]], [