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Alcyoniidae
Alcyoniidae is a family of leathery or soft corals in the phylum Cnidaria.〔(Leathery corals ). Wildsingapore.com (2010-02-28). Retrieved on 2013-09-17.〕 ==Description== A colony of leathery coral is stiff, hard and inflexible. It is composed of tiny polyps projecting from a shared leathery tissue. Members of the family may have two kinds of polyps; the autozooids have long trunks and eight tiny branched tentacles and project from the shared leathery tissue while the siphonozooids remain below the surface and pump water for the colony. They appear as tiny hollows or mounds among the taller autozooids. Different genera have different proportions of these two kinds of polyps. The autozooids only emerge when the colony is fully submerged.〔
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「Alcyoniidae」の詳細全文を読む
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