A limb or appendage of certain crustaceans that functions like a jaw for grasping and handling food.
From Greek gnathos (jaw) plus pous (foot), referring to appendages that function as both feeding limbs and jaw-like structures in amphipods and isopods.
Amphipods have these special legs that act like a second pair of jaws—they're so useful that creatures literally evolved extra 'jaw-feet' to handle food better!
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