The English word for skate is ray.

The skate is the collective name for a variety of flat-bodied cartilaginous fish in the orders Skate and Ray. The body is flat, rounded, rhomboid or diamond-shaped, with five gill hollows and a short or absent caudal fin; the gill slits are located on the abdomen, and the ventral fins and trunk are fused to form a flattened disk; the eyes and stomata grow on the back. Named for the ancient belief that it was a flying fish.

Rays are found in most waters around the world. Lives in the mud and sand on the sea floor. Juveniles feed on benthic animals such as crabs and lobsters. Adults hunt mollusks such as squid. Ovoviviparous animals, the eggs are rectangular, protected by a leathery shell, commonly found on beaches in 180 million years ago, the skate in order to adapt to the seabed life, the body will be hidden in the sand, and slowly evolved into the present appearance.

Rays have a certain food value, tender meat, flavorful, meat and less bone, generally suitable for braising, stewing, frying, braising and other cooking methods. Some rays have pairs of large generators between the head and pectoral fins, which can produce a current of 50 amperes, and the voltage can even reach 200 volts, which is known as a "live power station in the sea.

The fish's entire pectoral fins resemble a pair of large wings, and they swim as if they were flying. They have prominent round eyes and two slits in their head through which oxygen-rich seawater enters their bodies and exits through gill slits in their abdomen behind their mouths.

Morphological features of skates:

The skate's endoskeleton is composed entirely of cartilage, with some areas of calcification and some hardness, but differs from the hard bony tissues that are formed through ossification. The body surface is covered with tatting scales, which are formed by ectoderm and mesoderm*** together in occurrence; the tatting scales and teeth are homologous structures. The mouth is located not at the end of the muzzle but on the ventral surface, and is transversely cleft (hence the name transverse-mouth class); the even fins are horizontally positioned; the caudal fins are of the crooked tail type.

The stomach is clearly differentiated, with a separate pancreas and a well-developed liver. Intestine with spiral flaps. No swim bladder. Gill intervals are elongated and extend to the surface of the body to connect with the skin, so that the gill slits open directly on the surface of the body. Heart with arterial cones.

The male reproductive duct is borrowed from the mesonephric duct. A single cloacal orifice opens outside the body. Males have copulatory apparatus called fin-feet. Oviparous, ovoviviparous or pseudoviviparous, fertilized in vivo, develops in vitro or in vivo. Spawning is small, but survival rate is high. Brain developed, more advanced than bryozoans. Brain size is large, and neural material appears at the top of the brain.