The Dianchi bullhead, Pseudobagrus medianalis, is a species of catfish in the family Bagridae.

It is endemic to the Lake Dianchi basin in Yunnan, China.

[2] It is a cryptic, benthic fish that hides during the daytime and forages on small fishes and aquatic invertebrates at night.

[1] This species was once a common fish in Lake Dianchi, but is now mainly restricted to spring systems draining to the lake.

This habitat is under threat from pollution and from conversion into fish ponds.