Discover molluscs of the genus Hapalochlaena

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Who are Hapalochlaena ?

Species of the Hapalochlaena genus are commonly called "blue ringed octopus". They are found in the Indo-Pacific region, especially from Australia to Japan. These octopuses are very poisonous. Their venom, contained in the saliva, has a strong paralyzing effect. The octopuses use it to immobilize their favorite prey : crustaceans.

The bright colors of the body and rings warn predators of their toxicity. However, some animals seem immunized, especially some species of cuttlefish.

All Hapalochlaena species have eight short arms and a slightly flattened head that ends in a point. Their colour vary depending on the environment and context. They are indeed able to change colour to escape predators or hunt. Their life expectancy is short and like most cephalopods, females die at the end of the reproductive cycle.

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