Tetrodotoxin, a poison over 1,000 times deadlier than cyanide is found in which creature?

Ertrodotoxin is a type of neurotoxin, and is produced by many fishes including, pufferfish, triggerfish, oceansunfish and porcupine fish. It is also produced by bacteria like Pseudomonas, and Vibrio. The toxin blocks the action potential of the neurons, and inhibit working of the nervous system