Instead of missing teeth in the upper jaw of a toothless whale, up to 1000 long horny plates, called "whalebones", grow. Plates up to 4 meters long are located across the gums at intervals of 0, 3-1, 2 cm one after the other, limiting the sides of the oral cavity. They are split into thin and long bristles that form a kind of thick sieve, or filter, which filters out planktonic mollusks, crustaceans and small fish from the water.
Once upon a time, the whalebone was one of the main and most valuable products of the whaling industry. Corsets and crinolines, frames of umbrellas and handles of whips, sieves, sieves, brushes, brushes, even wicker seats of chairs were made from it.
The Eskimos used a whalebone to hunt polar bears: a sharp strip of whalebone was rolled up in a spiral, filled with seal fat, which was allowed to freeze. When a bear ate this bait, the fat melted, the whalebone straightened and tore apart the stomach and other entrails, as a result of which the animal died.