[2] The stone sculpin was first formally described as Cottus knerii in 1874 by the Polish zoologist Benedykt Dybowski with its type locality given as Lake Baikal and the Angara, Irkut and Selenga rivers in Siberia.

[3] In 1949 Dmitrii Nikolaevich Taliev classified the stone sculpin in the monospecific genus Porocottus.

[6] The stone sculpin is most common in the southern part of Lake Baikal and prefers areas with a stony bottom,[6] but may also occur over sand.

[6] The stone sculpin breeds in the late spring and summer in water that is 6–10 °C (43–50 °F),[6] and up to 1.5 m (5 ft) deep.

[1] The female lays 200–700 eggs in a crevice under a stone, which are guarded by the male and hatch after about one month.