Tetrodotoxin
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Tetrodotoxin is a potent neurotoxin. Its name derives from Tetraodontiformes, an order that includes pufferfish, porcupinefish, ocean sunfish, and triggerfish; several of these species carry the toxin
A Chinese pharmacopoeia, 1930.
Blue-ringed octopus
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Blue-ringed octopuses, comprising the genus Hapalochlaena, are four extremely venomous species of octopus that can be found in shells between rocks and crevices in tide pools and also coral reefs in t
Tetrodotoxin
…triggerfish; several of these species carry the toxin. Although tetrodotoxin was discovered in these fish, it is found in several other animals (e.g., in blue-ringed octopuses, rough-skinned newts, and moon snails). It is also produced by certain infectious or symbiotic bacteria like Pseudoalteromonas, Pseudomonas, and Vibrio…
Hapalochlaena lunulata 2
Blue-ringed octopus from New South Wales, Australia