Cartilaginous fishes (Class Chondrichthyes) include sharks, skates, rays, and sawfish, distinguished by cartilaginous (not bony) skeletons, in contrast to the bony fishes (Class Osteichthyes) that include most other food/game fish.
Skate, electric ray, sawfish, and dogfish are all members of Class Chondrichthyes (cartilaginous fishes) -- skates and electric rays are batoids, sawfish are elongated rays,...
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