For the first time, the fauna of fish-like and fish of Chukotka (Chukotka Autonomous Okrug), represented by 53 taxa of species and subspecies ranks belonging to 27 genera and 16 families, has been fully described. 14 species and forms of Chukchi fish are not found in other - adjacent regions of Siberia and the Far East; 2 genera (Salvethymus and Dallia) and 9 species - endems of Chukotka.