A family of deep-sea crustaceans commonly called swimming crabs, characterized by their flattened bodies and adaptations to extreme ocean depths.
From Geryon (Greek mythological creature) plus the Linnaean family suffix -idae; the mythological reference was chosen by early marine taxonomists who named many creatures.
The Geryonidae family includes some of the most bizarrely adapted crabs on Earth—they're found at depths where pressures would crush a human instantly, yet they thrive in complete darkness.
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