Spisula

Spisula is a genus of marine bivalve molluscs belonging to the family Mactridae. These clams are characterized by their smooth, equivalve, and equilateral shells, which are typically oval or triangular in shape. The exterior of the shell is usually white or yellowish and lacks distinct ornamentation beyond growth lines. Spisula species are found in sandy or muddy bottoms of coastal waters worldwide, inhabiting intertidal zones and subtidal areas.

They are filter feeders, drawing in water through a siphon and extracting plankton and organic particles for nourishment. The siphons of Spisula clams are often quite long, allowing them to feed from a distance below the sediment surface. This genus is ecologically important, serving as a food source for various marine animals, including fish, crabs, and shorebirds.

Several species within the genus Spisula are of commercial importance. For instance, Spisula solidissima, commonly known as the Atlantic surf clam, is a significant fishery resource along the east coast of North America. It is harvested for its meat, which is often processed into clam chowder, fried clams, and other seafood dishes. Other species, though less commercially exploited, also contribute to marine ecosystems. The genus Spisula is a well-studied group of bivalves, providing insights into marine invertebrate biology and ecological interactions.