Class Cephalopoda Sign Video
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Cephalopods are active predators. They use their tentacles to grasp prey and their beak-like jaws to inject an immobilizing poison. The foot of a cephalopod has become modified into a muscular excurrent siphon and parts of the tentacles and head (Cephalopod means "head foot").
Source: Campbell, Neil A., & Reece, Jane B. Biology (7th edition), 2005.
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