Animalia > Chordata > Gasterosteiformes > Gasterosteidae > Culaea > Culaea inconstans

Culaea inconstans (Variable stickleback; Six-spined stickleback; Pinfish; Five-spined stickleback; Common stickleback; Common freshwater stickleback; Brook stickleback)

Language: Danish; Finnish; French; German; Mandarin Chinese; Swedish

Wikipedia Abstract

The brook stickleback (Culaea inconstans) is a small freshwater fish that is distributed across the US and Canada. It grows to a length of about 2 inches. It occupies the northern part of the eastern United States, as well as the southern half of Canada. Small populations are scattered throughout the Mississippi-Great Lakes basin extending to Colorado, New Mexico, Kentucky, Tennessee, etc., though some of these areas are not native to the species. This small fish inhabits clear, cool streams and lakes. They eat small invertebrates, algae, insect larvae, and occasionally their own eggs. They are also preyed upon by smallmouth bass and northern pike. Feeding time is usually dawn and sunset. The brook stickleback does have active competition mostly from minnows, but feeding times are differen
View Wikipedia Record: Culaea inconstans



Adult Length [1]  3.543 inches (9 cm)
Brood Dispersal [1]  In a nest
Brood Egg Substrate [1]  Ariadnophils
Brood Guarder [1]  Yes
Litter Size [1]  250
Maximum Longevity [1]  2 years
Diet [2]  Planktivore, Carnivore (Invertebrates)
Female Maturity [1]  1 year


Protected Areas

Prey / Diet

Najna consiliorum[3]


Aythya affinis (Lesser Scaup)[3]
Hiodon alosoides (Yellow herring)[3]
Salvelinus fontinalis (charr)[3]


Range Map

External References

NatureServe Explorer


Attributes / relations provided by
1Frimpong, E.A., and P. L. Angermeier. 2009. FishTraits: a database of ecological and life-history traits of freshwater fishes of the United States. Fisheries 34:487-495.
2Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
3Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
4Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0