Marine poisoning occurs when marine animals containing toxic substances are ingested. The toxins accumulate in the fish or invertebrates rather than the creature having a venom apparatus to inject the venom which occurs with envenomation. Most marine poisoning syndromes cause neurotoxicity, including ciguatera, paralytic and neurotoxic shellfish poisoning and tetrodotoxin (fish) poisoning.
Isbister GK, Kiernan MC. Neurotoxic marine poisoning. Lancet Neurol. 2005; 4 (4): 219-28.