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Hapalochlaena fasciata

Blue-lined octopus
Hapalochlaena fasciata.jpg
Hapalochlaena fasciata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Octopoda
Family: Octopodidae
Subfamily: Octopodinae
Genus: Hapalochlaena
Species: H. fasciata
Binomial name
Hapalochlaena fasciata
(Hoyle, 1886)

The blue-lined octopus (Hapalochlaena fasciata) is one of three (or perhaps four) species of venomous Blue-ringed octopuses. It is most commonly found around intertidal rocky shores and coastal waters to a depth of 15 metres (49 ft) between southern Queensland and southern New South Wales. It is relatively small, with a mantle up to 45 millimetres (1.8 in) in length. In its relaxed state, it is a mottled yellow-brown with dark blue or black streaks covering the whole body apart from the underside of its arms, but its vibrant blue patches appear as a warning when they feel threatened. Along with its other closely related species, the Blue-lined octopus is regarded as one of the dangerous animals in the sea, and its venom can be fatal to humans. Blue-lined octopus is one of the most common of several species of blue-ringed octopuses found in Sydney. Their size range from 4.5 cm, of an adult, to 5.5 cm.


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