Three examples of cartilaginous fish are skates, rays and chimeras. There are many types of each of these cartilaginous fish. For example, stingrays, butterfly rays, manta rays and sawfish are all rays.
Rays use barbs on their tails to protect themselves against predators. Skates lack such barbs, but their backs and tails have thorn-like objects to serve as protection. Most chimeras have a venomous spine and live in relative isolation in deep waters. Skates and rays tend to live on the bottom of ocean floors, although some do live higher up. Some rays also inhabit fresh water. Sharks are a fourth example of cartilaginous fish and are the closest living relative to chimeras.