The bridgelip sucker (Catostomus columbianus) is a fish in the family Catostomidae that occupies the Columbia River system.

Like all sucker fish, they live only in fresh water.

As adults they eat periphyton (green growth and microorganisms found on submerged substrata).

Adolescents, however, eat aquatic hatchlings and zooplankton.

They spawn around May, when the water temperature is between 8-13 C, and lay somewhere around 9,955 and 21,040 eggs.