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Euapta lappa
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Euapta lappa : ウィキペディア英語版
Euapta lappa

''Euapta lappa'', the beaded sea cucumber, is a species of sea cucumber in the family Synaptidae in the phylum Echinodermata. It is found on coral reefs in the Caribbean region.
==Description==
In appearance, the beaded sea cucumber resembles a long worm rather than a sea cucumber. It can reach up to a metre (yard) in length and has a diameter of up to . It lengthens and shortens repeatedly and when disturbed, the normally flaccid body retracts vigorously to a fraction of its original length. It has no internal respiratory tree, nor does it have tube feet, and the body surface is covered by rounded ridges. The skeletal structure consists of many tiny calcareous plates embedded in the cuticle. Little hooks project from these ossicles and make the body feel sticky to the touch. At the anterior (front) of the animal there is a ring of fifteen branched feeding tentacles. The body colour is pale brown or grey, often with white flecks or darker, longitudinal streaks and transverse banding.

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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