Columbia subject headings:
Organic water pollutants--Environmental aspects.
Organic water pollutants--Toxicology.
Harvard subject headings:
Algal toxins--Toxicology.
Tetrodotoxin--Toxicology.
Toxic algae--Toxicology.
Toxins--Physiological effect.
Princeton subject headings:
Marine toxins.
Paralytic shellfish poisoning.
Poisonous shellfish.