Reference Guide > Montana Fish Field Guide > Mudminnows > Blue Sucker
Central mudminnow - Umbra limi
Exotic Species (not native to Montana)
Global Rank: G5
State Rank: SNA
Agency Status
USFWS: none
USFS: none
BLM: none
CFWCS Tier: 4
General Description
Mudminnows are small, robust fishes with soft-rayed fins. The dorsal fin is set well back toward the tail, and the tail fin is rounded. The Central Mudminnow is the only Montana species and has a black bar at the base of the tail fin. Unauthorized introductions into Montana.
Diagnostic Characteristics
Overall dark colored; olive brown to brown-black above, sides mottled with dark brown or may have as many as 14 irregular dark vertical bars. Underside white to yellowish. Head broad, lateral line absent. Male's anal fin long, almost reaches base of tail fin; female's anal fin does not reach base of tail fin.
Distribution
Montana Range
Resident Year Round
Habitat
Small ponds, slow moving streams and marshes. Usually associated with vegetation, organic debris and mud.
Ecology
Very hardy. Can withstand water temperature extremes and comparatively high acidity. When oxygen in water insufficient, can gulp air at surface and use atmospheric oxygen. Therefore, tolerates stagnant conditions.
Management
Unauthorized introductions into Montana.
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:
Central mudminnow — Umbra limi. Montana Field Guide. Retrieved on January 31, 2009, from http://FieldGuide.mt.gov/detail_AFCHC03010.aspx
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