Distinguishing Characteristics |
Bivalve (2 shells); shell circular, fan-like, slightly inflated, with extensions or wings on either side of beaks, wings equal in length; color white with reddish purple blotching, usually with lighter colored rib in the center, right shell with less coloration (mostly white) than left shell, many variations of color and patterns; 17-23 (usually 20) strong radiating ribs, grooves between ribs on left shell with tiny concentric threads; beak central, pointed; insides with reddish brown on upper portion, strong radiating grooves; left shell slightly more convex or inflated than right shell. |
Similar Species |
The circular shape with equal length wings, and the light background with various mottling usually distinguishes this scallop. The bay scallop is usually a solid color with white interior and the right shell (which is usually white) is distinctly more convex than the left shell. Also, the bay scallop has 12-17 ribs while the calico scallop has 17-23 (excluding the wings). |
Habitat |
Gulf and high salinity bays, free-living, does not burrow |
Maximum Size |
6 cm (2 1/3 in) |
Other Common Names |
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Previous Scientific Names |
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Comments |
Rarely found north of Port Aransas. |