The longnose dace (Rhinichthys cataractae) is a freshwater minnow native to North America. Rhinicthys means snout fish (reference to the long snout) and catarace means of the cataract (first taken from Niagara Falls). Longnose dace are small, typically less than 100 mm and characterized by their fleshy snout that protrudes past the mouth. They are well adapted for living on the bottom of fast-flowing streams among stones. Longnose dace eat algae and aquatic insects and are important forage minnows for larger predatory fish.

Longnose dace can be mistaken for suckers because of their subterminal “sucker-like” mouth. However, longnose dace (like all members of the cyprinidae family) lack small fleshy projections, called papillae, on their mouths.

Ref: Longnose Dace Information