tetrodotoxin

1. (neurotoxicology) A neurotoxin, originally discovered in Tetraodontiformes, and found in pufferfish, blue-ringed octopus, etc.Examples: "Both creatures belong to a large pan-tropical order of fish, many of which have tetrodotoxin in their skin, liver, ovaries, and intestines."; "The blue-ringed octopus Hapalochlaena lunulata has tetrodotoxin, the deadly toxin it also releases in a bite, in their ink but the concentrations and effect in inking are not known."; "Among those who think of fugu as merely a distant delicacy, knowledge rarely goes beyond the fish’s infamous trait: In the most delicious species, the innards are suffused with the neurotoxin called tetrodotoxin (TTX)."Synonyms: TTXcountableuncountable