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Eccentric Sand Dollar Dendraster excentricus


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Eccentric Sand Dollar
credit: D. Gordon E. Robertson/CCSA

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Category: Seastars and relatives view all from this category

Description 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 along the Pacific Ocean from Alaska to Baja California.

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.

Habitat Ocean or bay shallows.

Range Alaska, California, Western Canada, Northwest.