Stingrays are cartilaginous fish that are closely related to sharks. Scientists distinguish five orders of these fish, which include 14 families and have 350 species.
Most stingrays are marine life, they are found in all oceans at depths of 2700 m. Some stingrays live in tropical rivers. Motoro is a species of stingrays from the river stingray family that lives in South America.
The body of the rays is flattened, wide, outwardly reminiscent of a disc or rhombus. Its length is from a few centimeters to 6-7 m. The maximum weight is up to 2.5 tons.
The largest stingray is the manta ray, or sea devil. It is named so because of the presence of head fins, which are rolled into a tube and stick out forward like horns.
Sawfish also belong to stingrays.
All skates have well-developed pectoral fins. The mouth and gill slits are located on the ventral side of the body.
Most stingrays live on the bottom, and only a few (manta rays and stingrays) swim freely in the water column. Among the stingrays there are those that feed on benthic animals (worms, molluscs and crustaceans), but there are also active predators that eat fish
Some stingrays have electrical organs on the sides of their bodies, while stingrays have spines on their tail, equipped with a poisonous gland Stingrays and sawfish are dangerous to humans.
Manta ray fry are faithful miniature copies of their parents.
Among the stingrays there are oviparous, viviparous and ovoviviparous. But their fertility is low (from one to several dozen embryos). Oviparous rays lay large eggs enclosed in a capsule at the bottom.
The skin of stingrays can be bare or covered with thorns. She is quite highly regarded. In some countries, egg capsules, called "mermaid wallets", are eaten.
In Korea, stingrays are eaten in the form of hwe (raw): a dish with them is called "honyohwe chomuchim."
The handles of Japanese katana swords were covered with stingray leather.