Clamming license california

DID YOU KNOW: The last legal-sized clams of at least 4 ½ inches in diameter harvested in Pismo Beach were in 1993. The largest living Pismo Clam on record is 7 3/8 inches, estimated to be 26 years old.

The Pismo Clam shell on display at the City of Pismo Beach is 8 inches in diameter!

Pismo Clam Information

The Pismo Clam is one of the largest types of clams found along the California Coast.

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They are bivalves, which means they have two siphons and a two-halved shell. The clams can grow up to 7 inches, if not interfered with by hungry human clammers or sea otters, who are their natural predators. Clams take approximately 5 years to reach legal size, growing only about 3/4 inch each year.

As clams approach 10 years of age, they seldom grow more than 1/8 inch per year. During high tide, the clams are covered with water and can be found a few inches below the wet sand, where they have buried themselves using their digging foot, with their siphon extended to the surface.

Water taken in through the incurrent siphon passes over the gills, where diatoms, algae,

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