Buffalo fish Meaning, Definition & Usage

  1. noun any of several large suckers of the Mississippi valley
    buffalofish.

WordNet

Definitions
  1. (Zoöl.), one of several large fresh-water fishes of the family Catostomidæ, of the Mississippi valley. The red-mouthed or brown (Ictiobus bubalus), the big-mouthed or black (Bubalichthys urus), and the small-mouthed (B. altus), are among the more important species used as food.

Webster 1913