Skates and rays have enlarged pectoral fins that attach to their head, reduced dorsal and caudal fins, eyes on top of the head, and gill slits on their ventral side. Rays move by swimming and moving their wings while gliding in the water to swim. Skates swim by creating a wave that begins at the forward edge of the pectoral fins and sweeps down the edge of the back fins, allowing them to glide along the sea floor as it's fins ripple, literally "skating" across the floor.
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