Health Advisories and Closures for California Finfish, Shellfish and Crustaceans

potentially toxic species

The California Department of Public Health(opens in new tab) (CDPH) coordinates a routine monitoring program along the California coast to sample mussels and other shellfish like clams and scallops for the presence of Paralytic Shellfish Poisoning (PSP) and domoic acid toxins. Commercial shellfish harvesters are also required to provide weekly shellfish samples to CDPH for PSP toxin assay and domoic acid analysis. If toxin levels are high enough, warnings and quarantines are issued to protect the recreational fishing public and shellfish consumers.

CDPH also has a coastwide, monthly seawater monitoring program(opens in new tab) which detects the naturally occurring, microscopic algae that produce PSP and domoic acid toxins. When toxin levels begin increasing, CDPH may expand its mussel sampling effort to include other seafood species. If toxin levels increase quickly beyond the federal alert level for either toxin, then CDPH may immediately issue a health advisory for all potentially impacted seafood species in the affected region.

This page was established as a source of information for fishermen and the fishing industry. When circumstances arise, CDPH(opens in new tab) warnings, quarantine information, and health advisories about consuming California's ocean finfish, shellfish and crustaceans will be posted here.

The Office of Environmental Health Hazard Assessment(opens in new tab) (OEHHA) also issues consumption advisories(opens in new tab) based on the amount of mercury or other chemical toxins found in finfish, shellfish and crustaceans. Safe eating guidelines(opens in new tab) to help you to reduce your exposure to chemicals in sport fish—fish that you and your family or friends catch—are also available from OEHHA.

News Releases

Razor Clam Fishery

CDFW has closed the recreational razor clam fishery in Del Norte County as of November 9, 2023, and in Humboldt County as of May 2, 2024.

Spiny Lobster Fisheries: Open and Closed Ocean Waters

Dungeness and Rock Crab Fisheries: Open and Closed Ocean Waters

Recreational Fisheries for Dungeness Crab and Rock Crab

Commercial Fisheries for Dungeness Crab and Rock Crab

  • The commercial rock crab season is open from the Humboldt Bay entrance at the north jetty (40°46.15’ N. latitude), including all ocean waters of Humboldt Bay, to near Cape Mendocino, Humboldt County (40°30.00’ N. lat.) as of May 23, 2019. The commercial fishery continues to be open south of the Humboldt-Mendocino county line to the U.S.-Mexico border. The fishery closure will remain in effect in two areas: 1) from the Humboldt Bay north jetty (40°46.15’ N. lat.) to the California-Oregon border (42°00.00’ N. lat.), and 2) from the Mendocino/Humboldt county line (40°00.00’ N. lat.) to 40°30.00’ N. lat. (near Cape Mendocino, Humboldt County), until state health agencies determine that domoic acid levels no longer pose a significant risk to public health in those areas and recommend the fisheries be opened, and the CDFW director provides notification of fishery reopening to commercial fishermen.
  • The northern California commercial Dungeness crab season opener, originally scheduled for Dec. 1, 2024, will be delayed for Mendocino, Humboldt and Del Norte counties (Fishing Zones 1 and 2). Crab meat quality tests could not be conducted due to high domoic acid concentrations in crab collected at northern port locations. The fishery opener delay will remain in effect until state health agencies determine that domoic acid levels in Dungeness crab no longer pose a significant risk to public health in those counties and recommend the fisheries be opened, and the CDFW director provides notification of fishery reopening to commercial fishermen; also, industry crab quality tests must indicate the crab are ready for market.
  • For commercial Dungeness crab season dates, see the commercial fishing regulations.
  • For the latest information on season delays or closures caused by entanglement risks, visit the CDFW Whale Safe Fisheries page.
  • Check this page frequently or call the Domoic Acid Fishery Closure Information Line at (831) 649-2883 for the most up-to-date information.

Additional Information

Marine Region (Region 7)
Regional Manager: Dr. Craig Shuman
Main Office: 20 Lower Ragsdale Drive, Suite 100, Monterey, CA  93940
Email CDFW's Marine Region  |  (831) 649-2870
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