Bluntnose Minnow

Bluntnose minnows are commonly 6.5 cm (2.6 in) long, with a maximum length of 11 cm (4.3 in). On the first two or three dorsal rays are dark pigmented spots. The scales between the head and the dorsal fin are noted to be smaller than the rest of the scales on the body. They have a rounded head and a terminal mouth, although the snout hangs a little bit over the mouth. The dark coloring on the edges of the scales cause a cross-hatched look along the body. The scales on these fish are cycloid scales, a type of leptoid scale. It is possible to find the age of a fish from the rings on the scales. The lateral line of a bluntnose minnow runs from its head to tail, ending in a black spot that makes them distinguishable from the fathead minnow.

The bluntnose minnow can be found in North America, in the Hudson Bay and Mississippi River basins from southern Quebec to southern Manitoba, Canada to Louisiana, United States. They are also found from the Saint Lawrence River in Quebec to the Roanoke River on the east coast of United States. There are also many non-indigenous populations found in Connecticut, Georgia, Maryland, Massachusetts, New York, Ohio, South Dakota, Utah, Virginia, West Virginia, and Michigan, thought to have been introduced by bait bucket release or stock contamination. Bluntnose minnows are thought to be the most abundant freshwater fish in the eastern part of the country.

These fish prefer to feed on aquatic insects, algae, diatoms, aquatic insect larvae, and small crustaceans called entomostracans. Occasionally they will eat fish eggs or small fish.

Bluntnose minnows spawn from early spring to midsummer, depending on their habitat. They attach their eggs under stones in depressions they have dug. During the mating season, the heads of the males will become darker and their bodies bluish. They also develop three rows of nuptial tubercles (bumps) on their heads. Eggs hatch in eight to fourteen days.