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CDPH Lifts Warning about Certain Shellfish from Marin County

Date: February 8, 2021
Number: SN21-002
Contact: CDPHpress@cdph.ca.gov | CDPH Marine Biotoxin Monitoring Program

The California Department of Public Health (CDPH) has lifted the December 31, 2020 shellfish safety notification today related to sport-harvested mussels, scallops, and clams in Marin County. The safety notification was issued due to dangerous levels of naturally occurring paralytic shellfish poisoning (PSP) toxins that can cause illness or death. Recent testing shows PSP toxins are at safe or undetectable levels for bivalve shellfish in this area.

The warning does not apply to commercially sold clams, mussels, scallops or oysters from approved sources. State law permits only state-certified commercial shellfish harvesters or dealers to sell these products. Shellfish sold by certified harvesters and dealers are subject to frequent mandatory testing to monitor for toxins.

PSP toxins affect the central nervous system, producing a tingling around the mouth and fingertips within a few minutes to a few hours after eating toxic shellfish. These symptoms are typically followed by loss of balance, lack of muscular coordination, slurred speech and difficulty swallowing. In severe poisonings, complete muscular paralysis and death from asphyxiation can occur.

For the most current information on shellfish advisories and quarantines, call CDPH's toll-free Shellfish Information Line at (800) 553-4133 or viewing the recreational bivalve shellfish advisory interactive map. For additional information, please visit the CDPH Marine Biotoxin Monitoring Web page. ​​

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