The subareas 23-4, to 23-6, and 23-10 are open to manila clams, littleneck clams, oysters and mussels only, closed to all other bivalve shellfish.
Marine Biotoxin – Toxins that are produced by certain species of naturally occurring microscopic algae that bloom under favourable conditions. Filter-feeding bivalve shellfish accumulate the toxins when they ingest toxic algae as a food source. The consumption of toxic shellfish can lead to illness and even death. The toxins do not kill the shellfish nor cause any discernible changes in the appearance, smell or taste of shellfish that would alert consumers of toxicity. As conditions (e.g., water temperature, salinity, and nutrient levels) become less favourable, the algae bloom subsides and with time, shellfish rid themselves of toxin and are once again safe to eat.
For more information on Marine Biotoxin and Sanitary Contamination Closures, go to Fisheries and Oceans Canada.