Minnow Minnows are small freshwater fish from several genera in the family Cyprinidae, particularly the subfamily Leuciscinae. In Ireland, they are called pinkeens. Anglers typically refer to smaller fish in the Leuciscinae subfamily as “true” minnows. Related Articles: Common Kingfisher (Alcedo atthis) Species Guide: Appearance, Diet, Habitat, Behavior, Stats, And Conservation Status