Chionopsis gnidia, is a species of medium-sized saltwater clam, a marine bivalve mollusc in the family Veneridae, the venus clams.

[1][2] It was originally described in 1829 by W. J. Borderip and G. B. Sowerby as Venus gnidia.

[3] It can be found throughout the coasts of the United States to Peru.

[4][5] The distribution area of chionopsis gnidia spans from both coasts of the United States to Central America and parts of South America.

[4][5] This species lives in the intertidal and sublittoral zones up to 33 meters deep.