CDPH Warns Public Not to Consume Sport-Harvested Bivalve Shellfish from Santa Cruz Countyā
June 6, 2025
SN25-012ā
What You Need to Know: CDPH warns consumers not to eat recreationally harvested mussels, clams, scallops or oysters from Santa Cruz County due to dangerous levels of paralytic shellfish poisoning (PSP) toxins detected in mussels from Santa Cruz County.
SACRAMENTO ā The California Department of Public Health (CDPH) is advising consumers not to eat sport-harvested mussels, clams, scallops, or oysters from Santa Cruz County.
PSP toxins affect the 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.
This warning does not apply to commercially sold mussels, clams, scallops, and 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.
The annual mussel quarantine remains in effect for the entire California coast. The annual quarantine prohibits the sport-harvest of mussels for human consumption and applies to all species of mussels harvested along the California coast, as well as all bays and estuaries. The purpose of the quarantine, which will continue through at least October 31, is to prevent paralytic shellfish poisoning (PSP) and domoic acid poisoning. Cooking does not destroy the toxins.
You can get the most current information on shellfish advisories and quarantines by calling CDPHāās 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. ā