Razor clams

Razor clams are seen on a beach. Due to high levels of domoic acid, the razor clam fishery was closed in Del Norte County.

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The California Department of Fish and Wildlife Director Charlton H. Bonham has closed the recreational razor clam fishery in Del Norte County following a recommendation from state health agencies determining that consumption of razor clams in the area poses a significant threat for domoic acid exposure.

Pseudo-nitzschia, a naturally occurring single-celled, marine alga, produces the potent neurotoxin domoic acid under certain ocean conditions. Bivalve shellfish, like clams and mussels, accumulate the toxin without being harmed. In fact, razor clams are known to bioaccumulate domoic acid, meaning it may not clear their system until long after a bloom has abated.

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