They primarily feed on the planktonic copepod Epischura baikalensis, the amphipod crustacean Macrohectopus branickii and larvae of sculpins, including those of their own species.
Their primary diet consists of planktonic copepods such as Epischura baikalensis, amphipod crustaceans like Macrohectopus branickii, and the larvae of sculpins, which may include their own kind.