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The blue-ringed octopus, despite its small size, carries enough venom to kill 26 adult humans within minutes. Their bites are tiny and often painless, with many victims not realizing they have been envenomated until respiratory depression and paralysis begins. [11] No blue-ringed octopus antivenom is available. [12]
The greater blue-ringed octopus, despite its vernacular name, is a small octopus whose size does not exceed 10 centimetres (3.9 in), arms included, with an average weight of 80 grams (2.8 oz). Its common name comes from the relatively large size of its blue rings (7 to 8 millimetres [0.28 to 0.31 in] in diameter), which are larger than those of ...
What makes this octopus famous is its venom. Saliva glands of the southern blue-ringed octopus produce the deadly neurotoxin, maculotoxin. [10] The neurotoxin, tetrodotoxin (TTX), is secreted in the posterior salivary gland, which is located in the intestinal blood system of the octopus. This may provide the toxin into its bloodstream.
"The Giant Pacific Octopus is not generally regarded as a dangerous octopus, unlike its counterpart the Blue-Ringed Octopus." These are the biggest octopuses in the world, with an average length ...
The blue-lined octopus is about the size of a golf ball, having a mantle length of 45mm, it is the smallest out of the four species that make up the genus. While at rest blue-lined octopus are highly camouflaged, due to the presence of chromatophores under the skin they can rapidly change body coloration, using aposematic signals to display ...
A freediver exploring the world beneath the waves of Victoria’s Port Phillip Bay captured the moment a blue-ringed octopus shook off the shells and seaweed that had made it “almost impossible ...
When the octopus is approached, it may extend an arm to investigate. 66% of Enteroctopus dofleini in one study had scars, with 50% having amputated arms. [118] The blue rings of the highly venomous blue-ringed octopus are hidden in muscular skin folds which contract when the animal is threatened, exposing the iridescent warning. [119]
Extant cephalopods range in size from the 10 mm (0.3 in) ... The Hapalochlaena lunulata, or the blue-ringed octopus, readily mates with both males and females.