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razor shell
The razor shell, ''Ensis arcuatus'', also called razor clam or razor fish, is a bivalve of the family Pharidae. It is found on sandy beaches in Northern Europe and Eastern Canada, such as Prince Edward Island, where it is very common.
In some locations, the common name "razor shell" is also used to refer to members of the family Solenidae, including species of the genera ''Ensis'' and ''Solen'', by some taxonomic classifications which include the family Pharidae within the family Solenidae. It prefers coarser sand than its relatives ''E. ensis'' and ''E. siliqua''.
==Description==
It is known for its elongated, rectangular shape, whose similarity to the straight razor gives it its name. The razor shell has been known to reach 〔(Large specimen. )〕 in length. The dorsal margin is straight while the ventral margin is curved. It can easily be confused with the slightly shorter and more curved ''E. ensis'' (in which both front and back are curved in parallel).
Razor shells have a fragile shell, with open ends. The shell is smooth on the outside and whitish in color, with vertical and horizontal reddish-brown or purplish-brown markings separated by a diagonal line. The periostracum is olive-green. The inner surface is white with a purple tinge and the foot is creamy white with brown lines.
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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