The skate looks like it has a flat, diamond-shaped body.

The skate's endoskeleton is composed entirely of cartilage, with some parts calcified and hardened, but unlike the hard bone tissue formed by ossification. The body surface is covered with tatting scales that are formed from ectoderm and mesoderm*** together; the tatting scales and teeth are homologous structures. The mouth is not located at the muzzle end but on the ventral surface and is transverse; the even fins are horizontal; the caudal fin is crooked. The stomach is clearly differentiated, with a separate pancreas and a well-developed liver.

Rays have a round or diamond-shaped body, with a broad pectoral fin that extends from the end of the muzzle to the root of the slender tail. Some species have a pointed muzzle, they have a flattened body and an elongated tail, and some species of skate have one or more venomous spines with serrated edges growing from their tails. The eyes and spouts of skates grow on the top of the head, on the bottom side of the mouth and nose, and are formed by the cartilage of the rostrum, which protrudes from the cranium.

Habits of the skate:

Skates are very similar to stingrays because they both have flat bodies. Juvenile rays feed on animals that live on the sea floor such as crabs and lobsters. When they grow up, they mainly hunt mollusks such as squid. When hunting, rays rely mainly on their sense of smell. While lying on the bottom of the ocean, rays use a special closed-mouth breathing technique to try to avoid inhaling sediment. When the skate breathes, water is drawn in through a tube at the top of the head and finally out through gill slits on the ventral surface.

Rays are benthic fish, widely distributed in the Atlantic Ocean, Indian Ocean, Pacific Ocean sea areas, China's East China Sea, Yellow Sea, Bohai Sea, South China Sea are distributed, inactive, habitat depth of 5 to 100 meters, often hide the body in the sand and mud, carnivorous, mainly shellfish, crustaceans, small fish, etc., food, oviparous, the female gave birth to a few children per fetus ranging from several to dozens of fish.