Sharks are believed to be the sister group or close relatives to a group of cartilaginous fishes known as "Rays" or "Rajiformes," which include stingrays, skates, and mantas.
Sharks are the sister group or close relatives to rays and skates. Rays and skates are cartilaginous fish that are closely related to sharks and share many of the same physical characteristics. Rays and skates can be found in shallow coastal waters around the world and typically feed on small fish and invertebrates.
Sharks are the sister group or close relatives of rays. Both animals belong to the class Chondrichthyes, which are cartilaginous fish. They share similar characteristics such as pectoral fins attached to the sides of their heads and gill slits on their undersides.