---
title: "Brook Stickleback"
description: "Culaea inconstans — Pesci. The brook stickleback (Culaea inconstans) is a small freshwater fish that is distributed across the US and Canada."
canonical: https://animalchecklist.com/it/animal/brook-stickleback
last_updated: 2026-09-20
---

# Brook Stickleback

> Culaea inconstans — Pesci. The brook stickleback (Culaea inconstans) is a small freshwater fish that is distributed across the US and Canada.

- Scientific name: *Culaea inconstans*
- Category: `fish` (Pesci)
- Habitats: `freshwater` (Laghi e fiumi)
- iNaturalist observations: 3615
- Wikidata: [Q1682380](https://www.wikidata.org/wiki/Q1682380)
- iNaturalist taxon: [58639](https://www.inaturalist.org/taxa/58639)

## Names

- en: Brook Stickleback
- de: Nordamerikanischer Bachstichling
- es: Perca de cinco espinas
- fr: Épinoche à cinq épines

## Countries with the most observations

CA (1910), US (1486)

## Summary

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…

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Brook_stickleback

## Photo

![Brook Stickleback](https://animalchecklist.com/img/animals/brook-stickleback/medium.jpg)

Photo: Logan Stecker · CC0 · inaturalist — https://www.inaturalist.org/observations/287361346

## Machine access

`GET https://animalchecklist.com/api/v1/animals/brook-stickleback?lang=it` — see [openapi.json](https://animalchecklist.com/openapi.json).