Batoidea is a
superorder of
cartilaginous fish commonly known as
batoids or
rays, but it also includes the
skates and
sawfishes. Approximately 560 species are described in thirteen families. Batoids are in the fish subclass
Elasmobranchii along with
sharks, as they are closely related. Rays are distinguished by their flattened bodies, enlarged
pectoral fins that are fused to the head, and
gill slits that are placed on their ventral surfaces.