Dunkleosteus was an apex predator in the oceans of the Devonian period, about 400 million years ago. It could open its mouth in one-fiftieth of a second, creating a vacuum that sucked in its prey. It ate almost everything it encountered, including sharks, other members of its own species, and sea creatures with hard shells, which it regurgitated.
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Written by Curiosity Staff May 13, 2015
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