Cockle (bivalve) - Wikipedia
Asian Clam Is Not Our Jam - Lake Champlain Committee
Heart cockle shells transmit sunlight for photosynthesis using bundled fiber optic cables and condensing lenses
Clam Identification and Facts (From Arks to Tellins) - Owlcation
Identifying bivalve shellfish
For sustenance and tradition, Puget Sound tribes and scientists join forces to breed millions of clams
Shellfish License and Regulations For Oregon and Washington Clamming
Identifying Bivalve Shellfish Washington State Department of Health
Clams—Bivalves—PNW Ocean Life—Species Identification — Edmonds Underwater Park