Tracking sperm whales and jumbo squid

The sperm whale and its large prey, the jumbo squid, are among the deepest divers in the ocean, routinely reaching depths of 3,000 feet or more. Now, in a new study, a team of marine scientists reports the successful tagging of sperm whales and jumbo squid swimming together off Mexico's Pacific coast—the first time that electronic tracking devices have been applied simultaneously to deep-diving predators and prey in the same waters.

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