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
Hapalochlaena lunulata 2
Blue-ringed octopus from New South Wales, Australia
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
Blue-ringed octopus
…5 to 8 in)—and relatively docile nature, they are very dangerous if provoked when handled because their venom contains a powerful neurotoxin called tetrodotoxin. The species tends to have a lifespan around two to three years, which may vary depending on factors such as nutrition, temperature, and the intensity…
A Chinese pharmacopoeia, 1930.