Search Field Guide
Montana Animal Field Guide

Montana Field Guides

Brassy Minnow - Hybognathus hankinsoni

Brassy Minnow Black-and-White Plate - Brassy Minnow Black-and-White Plate
Brassy Minnow Black-and-White Plate
Brassy Minnow Black-and-White Plate - Brassy Minnow Black-and-White Plate Brassy Minnow Photograph - Brassy Minnow Photograph
Google for more images Google for web pages
Potential Species of Concern

Global Rank: G5
State Rank: SU

Agency Status
USFWS: none
USFS: none
BLM: none
CFWCS Tier: 3



 

General Description
As its name implies, live specimens of the brassy minnow have a brassy color. This native species also lives in plains streams east of the Continental Divide in Montana. Its herbivorous food habits are probably similar to western silvery and plains minnows. Brassy minnows are somewhat smaller than its sister species, only reaching a length of about 4 inches.

Diagnostic Characteristics
The back of the brassy minnow is olive-green to brown, the sides are yellowish or dull silver becoming brassy in adults, and the underside is white. A dusky midside stripe is usually present.

Distribution
Montana Range





Habitat
The brassy minnow favored the upper reaches of creeks characterized by no current, silt or mud bottoms, and aquatic vegetation in southeast Montana. They prefer clear, slow streams but have been taken in our larger rivers with high turbidities, and occasionally in lakes.

Food Habits
Brassy minnows are herbivorous. They feed mainly on diatoms and other algae, which it scrapes from the bottom.

Ecology
These fish tend to be abundant in habitats with few predators, as they seem to be very vulnerable to fish predation.

Reproductive Characteristics
Brassy minnows probably spawn in the second or third year during May through July.

Citations & Sources
  • Holton, G. D. 2003. A field guide to Montana fishes. Mont. Dept. Fish, Wildl. Parks, 95 pp.
Citation for data on this website:
Brassy Minnow — Hybognathus hankinsoni.  Montana Field Guide.  Retrieved on November 20, 2008, from http://FieldGuide.mt.gov/detail_AFCJB16020.aspx
 
There are currently 40 active users in the Montana Field Guide.