Wrinkled Rock Borer

Hiatella arctica

Hiatella arctica, known as the wrinkled rock-borer, the arctic hiatella or the arctic saxicave, is a species of saltwater clam, a marine bivalve mollusc in the family Hiatellidae. The white shell of this mollusc is thick and more or less rectangular, but generally irregular in shape. It is up to 45 mm (1.8 in) long.

Scientific name
Hiatella arctica
Family
Hiatellidae