Since September 2013, Tolowa Dee-ni' Nation has been submitting shellfish samples to the California Department of Public Health (CDPH) in Richmond for analysis and detection of naturally occurring marine toxins that will inform local and statewide health advisories and quarantines.
Domoic acid is a naturally occurring toxin that is related to a "bloom" of a particular single-celled diatom called Pseudo-nitzschia, while PSP is related to a "bloom" of single-celled dinoflagellates called Alexandrium. The conditions that support the growth of Pseudo-nitzschia and Alexandrium are impossible to predict. Crustaceans, fish and shellfish are capable of accumulating elevated levels of both toxins without apparent ill effects on the animals. Elevated levels of these toxins in crustaceans, fish and shellfish pose a significant risk to the public if these adulterated products are consumed. Domoic acid and PSP can be fatal to people if consumed in high doses.
Symptoms of domoic acid poisoning can occur within 30 minutes to 24 hours after eating toxic seafood. In mild cases, symptoms may include vomiting, diarrhea, abdominal cramps, headache and dizziness. These symptoms disappear within several days. In severe cases, the victim may experience trouble breathing, confusion, disorientation, cardiovascular instability, seizures, excessive bronchial secretions, permanent loss of short-term memory (a condition known as Amnesic Shellfish Poisoning), coma or death.
Paralytic Shellfish Poisoning symptoms begin within a few minutes to a few hours after eating toxic shellfish. Symptoms begin with tingling and numbness of the lips, tongue and fingertips. Later symptoms are lack of balance, lack of muscle coordination, slurred speech and problems in swallowing. Complete paralysis and death can occur in severe cases.
There are no mechanisms for these toxins to accumulate in lat (seaweed), therefore it would be safe to consume. Duu-ma (anemones) should also be safe to eat.