Procottus major is a species of ray-finned fish belonging to the family Cottidae, the typical sculpins.

This species is endemic to Lake Baikal in Siberia.

[2] It was originally described as a subspecies of the similar but smaller red sculpin (P. jeittelesii).

P. major can be found at depths of up to 900 m (3,000 ft),[2] especially on a muddy or rocky-mud bottom.

[3] It feeds on smaller animals, especially gammarids, and breeding occurs in the winter at depths of 60–140 m (200–460 ft).