‘We don’t know what’s in the ocean’

When marine biologist Ron O’Dor hauled in a 15-kilogram squid from the Sea of Cortez in Mexico this month, he knew he had a big one: The animal had been tagged by his team with a tiny electronic sensor that collects detailed data about squid movement ? a boon to understanding secretive cephalopod behaviour, as well as unlocking the larger mysteries of the world’s oceans.

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