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Holothuriidae
Holothuriidae is a family of sea cucumbers, a type of echinoderm.
==Description==
Members of the Holothuriidae family have thick fleshy bodies and several rows of tube feet which are used for moving around and for adhering to the surface. The body is often covered with blunt projections known as papillae. Many of the members of this family are able to eject a mass of fine sticky threads known as cuvierian tubules to distract predators, or even turn their viscera inside out.〔(Saltwater Aquariums )〕
For the taxonomic determination, the genera ''Actinopyga'' and ''Bohadschia'' have their spicules exclusively shaped like sticks, and the genera ''Holothuria'' and ''Labidodemas'' never have theirs shaped like tables. ''Actinopyga'' is also equipped with anal teeth (modified podia), and never throw out Cuvieran tubules, just like ''Pearsonothuria''.
Members of this family occur throughout the oceans of the world at low to middle latitudes. They often live in coral reefs and nearby sandy habitat types, and a few occur in deeper waters. In the Indo-Pacific they are often dominant taxa in coral reef habitat. Most species are detritivores.〔Kerr, A. M., et al. (2005). (Molecular phylogeny of coral-reef sea cucumbers (Holothuriidae: Aspidochirotida) based on 16S mitochondrial ribosomal DNA sequence. ) ''Marine Biotechnology'' 7(1), 53-60.〕
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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