What do rays and skates typically feed on

Skates and some shark species lay eggs. Empty skate egg cases, which are called mermaid's purses, are sometimes found washed up on the beach. Cartilaginous. them are parasites that feed on other fish. These include sharks, rays, and skates. Their skeletons are made of cartilage, just like the skeletons of. Spotted Eagle Ray Rays and skates are a cartilaginous fish like sharks. Since v1 they usually can not see their preytheir eyes are on the top of.