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''Pearsonothuria'' is a genus of sea cucumbers in the family Holothuriidae. ''Pearsonothuria graeffei'' is the only species in the genus.〔 Graeffe's sea cucumber is found in the tropical Indo-Pacific Ocean and the type locality is Viti Island, Fiji.〔 ==Description== ''Pearsonothuria graeffei'' is a roughly cylindrical, thin-walled sea cucumber that grows to about in length.〔(Graeffe's sea cucumber ) Tropical Reefs. Retrieved 2012-02-16.〕 Its mouth, at one end, is surrounded by a ring of up to 24 leaf-like, paddle-shaped tentacles with black stalks which are black on the upper side and white beneath. The anus is at the other end of the body and there are several rows of tube feet along the underside. The colour of the adults is pale brown and white, with black speckles and small thorn-like protuberances. By contrast, the juveniles are brightly coloured, being white and blue or black, with a few large, yellow, thorn-like projections. This colouration makes them closely resemble the sea slug, ''Phyllidia varicosa'', the bright colours of which warn predators of its toxicity. The appearance of the juvenile sea cucumbers begins to change when they grow larger than the slug and the mimicry is no longer effective.〔(Invertebrate of the month: ''Pearsonothuria graeffei'' ) Florida Museum of Natural History. Retrieved 2012-02-16.〕 File: Holothuriidae - Bohadschia graeffei.jpg|A live juvenile individual of '' Pearsonothuria graeffei'', in situ off Madagascar. File:Bohadschia graeffei.jpg|Adult specimen in the Maldives. File:Pearsonothuria graeffei.jpg|Close-up on the tentacles. File:Pearsonothuria graeffei bassin.JPG| 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pearsonothuria」の詳細全文を読む スポンサード リンク
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