any fish belonging to the family Chiasmodontidae, small deep-sea predators with hinged skulls and prominent fangs.
From Chiasmodon (the genus name) with the suffix -id, indicating membership in a family or group of related organisms.
Chiasmodontid fish are named after their crossed teeth, but their real superpower is their unhinged skulls—literally, their jaws can dislocate sideways, not just up and down!
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