Tivela stultorum (Pismo clam)

Photo Credit: Nick Schooler

Pismo clams are bivalve mollusks that vary from cream to gray in color. Individuals tend to bury into the sand of the intertidal-subtidal interface and can be found at depths of 7-150 meters. Populations are established from Socorro Island, Mexico to Santa Cruz, California and rare north of Pismo Beach, California. T. stultorum can filter feed on phytoplankton, zooplankton, bacteria and detritus. Predators can include crabs, snails, gulls, fishes and other intertidal organisms. 

Further reading: https://eol.org/pages/46469743