The blue-ringed octopus is a truly mesmerising creature... looking at its luminous blue rings on yellow skin seems almost hypnotic. Who wouldn't want to keep this beautiful creature in a tank at home? Maybe those who know how it kills its prey; by piercing through tough exoskeletons with a sharp venomous beak. This is how it feeds on crabs and shrimp. Although not insterested in hunting humans, they can bite if feel threatened and its venom would kill an adult in minutes!

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