Adacna vitrea

Adacna vitrea is a brackish and freshwater cockle, a bivalve mollusc of the family Cardiidae. It has a variably shaped irregularly oval, thin, semitranslucent whitish and often partially pinkish or purple shell, up to 20–28 mm (0.79–1.10 in) in length, with flattened ribs. The species is widely distributed throughout the Caspian Sea where it lives at depths from 0 to 30 m (0 to 98 ft). A distinct form with somewhat more developed ribs and often a whitish...