Beak (bivalve)

In the context of bivalve mollusks, the term "beak" refers to a specific part of the shell. Bivalves are a class of marine and freshwater mollusks that have two hinged shells, or valves, which are often symmetrical. The beak is the point on the shell at which the two halves (valves) are hinged together and is typically located at the dorsal (top) part of the shell.