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The major neurotoxin component of the blue-ringed octopus is a compound originally known as 'maculotoxin'; in 1978, this maculotoxin was found to be tetrodotoxin, [17] a neurotoxin also found in pufferfish, rough-skinned newts, and some poison dart frogs; the blue-ringed octopus is the first reported instance in which tetrodotoxin is used as a ...
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 ...
Many venomous animals, such as this greater blue-ringed octopus (Hapalochlaena lunulata), are brightly colored or can display bright colors to warn potential predators. Numerous animal species naturally produce chemical toxins which are used to kill or incapacitate prey or as a defense against predators.
The following is the list of critically endangered (CR) and endangered (EN) species included in the National List of Threatened Terrestrial Fauna of the Philippines as per DENR Administrative Order 2019-09. [1] The list below currently does not include fauna classified as vulnerable (VU) and other threatened species (OTS).
This is a list of threatened plant and animal species in the Philippines as classified by the International Union for Conservation of Nature (IUCN). It includes vulnerable (VU), endangered (EN), critically endangered (CR), and recently extinct (EX) species. It excludes near threatened (NT), data deficient (DD), and prehistoric species. [1]
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.
All octopuses have venom, but few are fatally dangerous. The greater blue-ringed octopus, however, is considered to be one of the most venomous animals known; the venom of one is enough to kill ten adult humans. [3] It uses the neurotoxin tetrodotoxin, which quickly causes respiratory arrest. Estimates of the number of recorded fatalities ...
This benthic octopus is one of four members of the genus Hapalochlaena, with the other species being the greater blue-ringed octopus (Hapalochlaena lunulata), southern blue-ringed octopus (Hapalochlaena maculosa), and the blue-ringed octopus (Hapalochlaena nierstraszi). The blue-lined octopus is the only species of the four to display lined ...