- Cottus czanaga Dybowski, 1869
- Cottus poecilopterus Heckel, 1837
Siberian Bullhead, Alpine Bullhead
No status defined
Value of species
Cottus populations from the Kolyma, Amur and Korean drainages belong to other species.
Streams in Carpathians draining to Danube, Dniestr, Vistula and Odra. Baltic basin, especially in northern Sweden and Finland between 64 and 68°N, central Finnish lakes area, a few streams in southern Finland, Lake Ladoga and southern Lake Onega drainage, a few lakes in northern Germany (extirpated), Lake Hancza (Poland) and Skjernaa drainage (Denmark). In Siberia from River Ob eastward to Lena. Absent in rivers draining to Baltic Sea south of Iijöki drainage in central Finland and in rivers draining to the White and Barents Seas.
Habitat: Northern, and mountain and foothill streams, oligotrophic lakes. In Carpathian streams usually more upstream than C. gobio, very rarely syntopic.
Biology: Lives up to six years. Spawns for the first time at 2-4 years, about 40 mm SL. Spawns in February-April, when temperature rises above 5°C. Females spawn once a year. Most individuals spawn 2-3 seasons. They lay adhesive eggs in a compact clutch on ceiling of small cavities in gravel or rock bottom. Males guard eggs until hatching. Males may guard egg clutches of several females. Nocturnal, shifts to day-activity during winter in the Arctic. Feeds on a wide variety of benthic invertebrates.
- Соколов Н.Ю. Каталог колекції круглоротих і риб Державного природознавчого музею НАН України // Наукові записки Державного природознавчого музею. – Львів, 2004. – Т.19. – С. 15-28.