Wiktionary
alpine bullhead
n. A species of fish in the Cottidae family, (taxlink Cottus poecilopus species).
Wikipedia
Alpine bullhead
The alpine bullhead or Siberian bullhead (Cottus poecilopus) is a species of freshwater fish in the Cottidae family of sculpins. It is found in Belarus, China, the Czech Republic, Denmark, Estonia, Finland, Germany, North Korea, Latvia, Lithuania, Moldova, Norway, Poland, Romania, Russia, Slovakia, Slovenia, Sweden, and Ukraine. This fish is listed as being of " Least Concern" by the IUCN.