Manila Clams

Though Manila clams (Ruditapes philippinarum) are sometimes referred to as steamer clams, steamer clams can also refer to another species, the native littleneck clam (Leukoma staminea). Both are found from central California to British Columbia, Canada, and native littlenecks occur in Alaska. While both clam species are roughly the same size, native littlenecks typically have less colorful shell patterns and conical, rather than gridded, pattern across their shells. 

Overall availability

Manila clams are farmed in California and Washington. Commercially grown Manila clams are available year-round in a variety of forms including, live, steamed, canned and frozen. 

Management

Manila clams are grown using broadcast bottom culture methods. Commercial shellfish aquaculture is managed by a variety of agencies such as the state Departments of Fish and Wildlife or Natural Resources (CA and WA), the Army Corp of Engineers, the Food and Drug Administration, and local and state Departments of Public Health. In Washington, shellfish aquaculture is also co-managed with Treaty Tribes. Learn more about commercial shellfish aquaculture.