Rhinichthys atratulus(Blacknose Dace)
Female Blacknose Dace

Scientific classificationDomain: EukaryotaKingdom: AnimaliaPhylum: ChordataClass: ActinopterygiiOrder: CypriniformesFamily: CyprinidaeGenus: RhinichthysSpecies: Rhinichthys atratulus

The Blacknose Dace is a member of the minnow family, has an olive green to brown back and a silvery white underside with a broad black band that runs from head to tail. Rounded head and compressed in the back, forked tail, males have a rusty brown color along the lower side of the black band, sometimes takes over the black band and it becomes red, and on the pectoral fins, during breeding season. Maximum length is three inches long. Sometimes has numerous black spots or bumps covering its body and fins(caused by larval parasitic worm found beneath the skin. Generally lives two to three years.


Small freshwater streams with brackish, rapid and clear pools, among stones and gravel of stream bottoms, trout streams and lake tributaries. Ranging from the United States into Canada. upper Mississippi River drainages from Minnesota to Pennsylvania and in Canada from Nova Scotia to Manitoba. It is also found in upland streams of Atlantic slope drainages from Georgia northward.

Predators and Prey:

Aquatic chironomids insect larvae, and diatoms. Desmeds and other phytoplankton are eaten during November through March. They will also eat their own eggs, or others eggs if given the opportunity. In turn the blacknose dace is eaten by larger brook trout and fish eating birds, such as mergansers and loons. Fishermen, they catch the Blacknose Dace and use it for bair for other larger fish such as carp, bass, and trout.

Native or Invasive :

Cannot find information.

Form vs. Function:

The body of the Blacknose Dace is long and sleek and therefore streamlined so it is quick to get away from predators

Interesting Facts:

Breeds only when the temperature of the water is 70 degrees. Females and males make a nest of small pebbles to store the eggs until the hatch. Each female lays around 750 eggs. Blacknose Dace only live to around the age of two years old.