Rajiformes

Myliobatidae - Eagle rays feed on mollusks and crustaceans, crushing their shells with their flattened teeth, while devil and manta rays filter plankton from the water.

Gymnuridae - The body of butterfly rays is flattened and surrounded by an extremely broad disc formed by the pectoral fins, which merge in front of the head.

Rajidae - Skates have slow growth rates and, since they mature late, low reproductive rates.

Anacanthobatidae - They lack the dorsal denticles of other rays, hence their name, from Greek an- meaning "without", acantha meaning "thorn", and bathys meaning "deep".

Rhinobatidae - The guitarfish are a family, Rhinobatidae, of rays.

Dasyatidae - The stingrays are a family—Dasyatidae—of rays, cartilaginous fishes related to sharks.

Hexatrygonidae - The sixgill stingray, Hexatrygon bickelli, is an unusual species of deep-sea ray.

Potamotrygonidae - River stingrays are Neotropical freshwater fishes of the Potamotrygonidae family .

Plesiobatidae - The deepwater stingray or giant stingaree, Plesiobatis daviesi, is a species of ray and the only species in the family Plesiobatidae.

Urolophidae - Urolophidae is a family of rays found in the Indo-Pacific, commonly known as the round stingrays or round rays.

Urotrygonidae - Urotrygonidae is a family of rays native to the tropical and warm temperate marine waters of the Americas, commonly referred to as the American round stingrays.