Deep-Sea Dragonfish

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Measuring just 15 centimeters (6 inches) in length, the dragonfish (Aristostomias scintillans) has an “enormous” jaw relative to their size capable of extending and opening to beyond that of a conventional jaw. It’s also lined with dozens of fang-like teeth sharper than those found in a piranha. To keep their prey in the dark, the teeth of dragonfish have evolved a transparent structure that essentially makes their fearsome mouth invisible.

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Deep-Sea Dragonfish

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