When tell about Rotan or as still call representatives of this species of fishes, to a brand, as a rule, mean fish who belongs to family under the name goloveshkovy. Rotan is the representative of a sort of brands. In Latin these fishes carry the name Perccottus or Eleotris.

Many skilled fishers know that aquarians in the second half of the 20th century often called Rotan the Amur bull-calf. Various specific Latin names which can meet in literature are wrong. In particular it is about such names as glehni and glenhi. Besides, such name of a sort as Percottus also mistakenly can be used.

One of distinctive osoyebnnost of Rotan is the luska. She small also keeps not a body very strong. Therefore, those who is engaged in catching of this fish are recommended to buy in the use in advance the fish scaler which will allow to process this species of fish before preparation.

The body at Rotan rather short and rather dense, it, as a rule, becomes covered with dim scales which size it is possible to call an average safely. His coloring can change depending on external factors. Most of all take place such tone as dirty-brown and glaucous. On Rotan’s body there are medium-sized spots, and also various strips which form differs in the abnormality.

In primary quantity of cases color of a belly of Rotan has a grayish shade. During the so-called marriage period Rotan usually darkens. The head of this fish – big. Also large mouth is filled with quite sharp teeth which are located in several rows. On branchiate covers there is a thorn directed back which existence is characteristic of many the okuneobraznykh, however, unlike them Rotan’s thorn differs in the softness.

Fins at representatives of this kind of fishes also soft, not having sharp thorns. Besides, it should be noted existence of couple of back fins, and forward of them is slightly shorter, than back. Along with it Rotan has quite rather short anal fin. Chest fins, in turn, big and roundish. The same can be told about a form of a tail fin.