Fragile Surfclam
Mactrotoma fragilis (Gmelin, 1791)
Family Mactridae
The Fragile Surf Clam is not a common shell on S. Hutchinson Island. It is very thin and there is an indentation on one side.
Three fragile Surfclams from S. Hutchinson Island - December 2020)
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.