Just a touch of the chemical and squid went from swimming calmly to fin beating and forward lunging.
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The colossal squid, with a body longer than a school bus and sharp tentacles, is no monster predator.
A biologist says that jumbo squid appearing in the waters off San Diego are not man-eaters, despite the reports of freaked-out divers.
Rising carbon dioxide levels and expanding ocean minimum zone in ocean could force squids out of habitat.
It marks the first time scientists had clearly picked up a strong sonar signal for squid, which lack the bones and swim bladders that give away other marine creatures.
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