Fragile Surfclam
Mactrotoma fragilis (Gmelin, 1791)
Family Mactridae
The Fragile Surf Clam is not a common shell on S. Hutchinson Island.
Shell size to 45 mm; shell thin but strong, oval, compressed. Posterior region with two ridges, beyond which shell gapes. Color white, with strong grayish-brown periostracum.