a genus of small deep-sea fish known for their fang-like teeth and hinged skulls that allow them to swallow prey larger than themselves.
From Greek chiasma ('cross') and odous ('tooth'), referring to the crossed or interlocking teeth characteristic of these remarkable fish.
Chiasmodon species have jaws that actually dislocate to swallow fish as large as themselves—they're like underwater contortionists that can eat a meal bigger than their own head!
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