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The most dangerous one would probably be the blue ringed octupus ,which I lives in the great barrier reef, because of its deadly poison. Giant Pacific octopuses might also be dangerous because they are known to kill sharks that they share tanks with in aquariums. The day octopus is almost as big as a giant octopus except that it can float in the ocean and attack divers.

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14y ago

What else can I help you with?