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What is known and unknown about octopuses?

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1) Octopuses are waaay old. The oldest known octopus fossil belongs to an animal that lived some 296 million years ago, during the Carboniferous period. That specimen belongs to a species named Pohlsepia and is on display at the Field Museum in Chicago. read more

Yes, like chimpanzees, dolphins and crows, octopuses are among the special set of intelligent animals that have been observed using tools. In 2009, scientists reported they had watched veined octopuses (Amphioctopus marginatus) picking up discarded coconut shells and using them like mobile homes. read more

All octopuses are venomous, but only the small blue-ringed octopuses are known to be deadly to humans. Share There are around 300 recognized octopus species, which is over one-third of the total number of known cephalopod species. read more

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