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Colochirus quadrangularis
''Colochirus quadrangularis'', commonly known as the thorny sea cucumber, is a species of sea cucumber in the family Cucumariidae. It is found in shallow seas in tropical parts of the Indo-Pacific region.
==Description==
''Colochirus quadrangularis'' is a moderate sized sea cucumber growing to about in length. The roughly cylindrical body has four longitudinal ridges giving it a square cross section and a flat base. It has irregular, thorn-like, soft projections called papillae lying along these ridges. The leathery body wall is reinforced by calcareous spike-like structures which in this species include basket-shaped spicules and perforated ellipsoids. There is a ring of large, branched feeding tentacles round the mouth. There are three rows of red tube feet on the underside and the body tapers at the posterior end, the anus being surrounded by 5 tooth-like projections. The colour is mainly grey often with pink on the ridges and thorns, and with yellow or reddish tentacles.〔(''Pentacta quadrangularis'' ) Marine Species Identification Portal. Retrieved 2012-02-10.〕〔(''Colochirus quadrangularis'' ) Aquaportail.com. Retrieved 2012-02-10.〕〔(Thorny sea cucumber: ''Colochirus quadrangularis'' ) Wildsingapore. Retrieved 2012-02-11.〕
''Colochirus quadrangularis'' can be confused with the rather similar pink warty sea cucumber (''Cercodemas anceps'') but the body of the latter is covered in low, warty protuberances rather than thorny projections.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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