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This species of clam is Originally form Asia (as the name suggests) it was Introduced into the Pacific Northwest's freshwater systems in the 1900's. It's usually less than one inch long, which resembles a small marine clam. The beak is centrally located on the dorsal margin and there are lateral teeth on both sides of the beak. The beak is high, giving Asian clams a triangular or acutely oval shape.
Fresh water lakes, rivers, and ponds Throughout the Pacific Northwest and Southern Asia.