LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
Humboldt squid (Dosidicus gigas) beak. This aggressive, predatory squid is also known as the jumbo squid and can swim in groups of more than 1200 individuals. It has a hard, sharp beak that is used to rip flesh apart when attacking prey or enemies. Photographed in Baja, Mexico.
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