Donax gouldii, common name the Gould beanclam, is a species of small saltwater clam, a marine bivalve mollusk in the family Donacidae.

[3] This Donax species, known for its periodic population explosions, was eaten by Native Americans in Southern California,[3] particularly the Luiseno and Kumeyaay Indians of San Diego County.

The bean clam may reach one inch in length, and is of varying coloration, often cream, buff, orange or blue and frequently featuring darker rays projecting from the hinge area.

The bean clam hydroid, Eucheilota bakeri, is often found attached to the posterior end of the shell.

[4] The die-offs are thought to be the result of mass infection of the population by a parasitic microorganism similar to Perkinsus marinus, which is known for disrupting oyster farming in the Gulf of Mexico and elsewhere on the southeastern coast of the United States.