Red tide is not a good things... here's a report from up north:

Red tide toxin has forced the closure of shellfish harvesting along much of the British Columbia coast, including Vancouver Island.

West Vancouver Island, the north coast and parts of the inside waters of the island are now closed to harvesting bivalve shellfish, including oysters, mussels, clams and scallops.

Eating shellfish infected by red tide can result in poisoning almost immediately. Cooking does not kill the toxin.

Symptoms are numbness and tingling of the mouth, staggering and difficulty speaking and paralysis. Death can result without treatment.

Washington state's inland waters to the south also are periodically affected by the toxins, and shellfish harvested from Kodiak's beaches have resulted in death of people who consumed them.

Shellfish harvested commercially in Alaska come from beaches that are tested periodically by the state.