Procottus major

Procottus major is one of the four recognized species of the deepwater sculpin fish genus "Procottus", endemic to Lake Baikal in Russia. 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 , especially on a muddy or rocky-mud bottom. In the spring and summer it typically occurs deeper than , and in the fall and winter from . It can reach a length of , but is usually . It feeds on smaller animals, especially gammarids, and breeding occurs in the winter at depths of . This species is fished and its young are an important food source for other fish.