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Dendraster excentricus : ウィキペディア英語版 | Dendraster excentricus
Eccentric sand dollar (''Dendraster excentricus''), also known as the sea-cake, biscuit-urchin, western sand dollar, or Pacific sand dollar, is a member of the order Clypeasteroida, better known as sand dollars, a species of flattened, burrowing sea urchins found in the northeast Pacific Ocean from Alaska to Baja California. ==General information== ''Dendraster excentricus'' is an irregular echinoid that is flattened and burrows into the sand, unlike the regular echinoids,or sea urchins. It can be found living in the Pacific Ocean from Alaska to Baja California.The range for ''Dendraster excentricus'' is larger and includes the range of the other two extant species of Dendraster: ''D. vizcainoensis'' and ''D. terminalis''. The flower pattern in this species is off-center, giving it the species name ''excentricus''. Its test (skeleton) is compared to that of a sea urchin below.
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