Australian Cardita Shell, Cardita crassicostata: The Australian Cardita Shell is heart shaped with heavy square ribs; the scaly dorsal area is offset.
It is one of the most colorful members of the family with a rich orange pink spotted with brown coloration.
They range in size to 6.5 cm (2.6 inches). They are found in sand intertidally and offshore at depths up to 150 feet and range throughout the Sea of Cortez and south to Peru.
Australian Cardita Shells are presently one of the most sought after shells in the Western Hemisphere being used to make decorative jewelry and are also sold for shell collections commanding high prices via a brisk internet trade.
The Australian Cardita Shell is a large sized member of the Carditidae Family, the Cardita Shells or little Heart Shells, a small bivalve family with approximately 50 global species. They are medium sized sturdy shells with well-developed radial ribbing. Most of the Cardita Shells are tropical or temperate water dwellers living in shallow water attached to rocks or on sand.