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Brook Trout
Salvelinus fontinalis
1,199 observations
Rainbow Trout
Oncorhynchus mykiss
1,185 observations
Rocky Mountain Cutthroat Trout
Oncorhynchus virginalis
1,024 observations
Brown Trout
Salmo trutta
908 observations
Bluegill
Lepomis macrochirus
469 observations
European Carp
Cyprinus carpio
385 observations
Largemouth Bass
Micropterus nigricans
384 observations
Creek Chub
Semotilus atromaculatus
354 observations
Green Sunfish
Lepomis cyanellus
301 observations
White Sucker
Catostomus commersonii
178 observations
Fathead Minnow
Pimephales promelas
167 observations
Longnose Dace
Rhinichthys cataractae
165 observations
Western Mosquitofish
Gambusia affinis
145 observations
Invasive
Arctic Grayling
Thymallus arcticus
111 observations
Channel Catfish
Ictalurus punctatus
105 observations
Speckled Dace
Rhinichthys osculus
98 observations
Smallmouth Bass
Micropterus dolomieu
97 observations
Yellow Perch
Perca flavescens
82 observations
Black Crappie
Pomoxis nigromaculatus
74 observations
Longnose Sucker
Catostomus catostomus
70 observations
Tiger Trout
Salmo trutta × Salvelinus fontinalis
65 observations
Rocky Mountain Cutbow
Oncorhynchus mykiss × virginalis
65 observations
American Gizzard Shad
Dorosoma cepedianum
63 observations
Walleye
Sander vitreus
62 observations
Northern Pike
Esox lucius
57 observations
Brook Stickleback
Culaea inconstans
56 observations
Greengill Sunfish
Lepomis macrochirus × cyanellus
56 observations
Grass Carp
Ctenopharyngodon idella
50 observations
Sockeye Salmon
Oncorhynchus nerka
49 observations
Goldfish
Carassius auratus
47 observations
Mountain Sculpin
Cottus punctulatus
47 observations
Black Bullhead
Ameiurus melas
43 observations
Roundtail Chub
Gila robusta
43 observations
Lake Trout
Salvelinus namaycush
34 observations
Northern Plains Killifish
Fundulus kansae
32 observations
Pumpkinseed
Lepomis gibbosus
28 observations
Johnny Darter
Etheostoma nigrum
28 observations
Red Shiner
Cyprinella lutrensis
28 observations
Amur Carp
Cyprinus rubrofuscus
25 observations
Plains Sand Shiner
Miniellus missuriensis
22 observations
Plains Topminnow
Fundulus sciadicus
21 observations
Golden Shiner
Notemigonus crysoleucas
20 observations
Flannelmouth Sucker
Catostomus latipinnis
17 observations
Central Stoneroller
Campostoma anomalum
16 observations
Bluehead Sucker
Pantosteus discobolus
16 observations
Redear Sunfish
Lepomis microlophus
13 observations
Mountain Whitefish
Prosopium williamsoni
13 observations
White × Striped Bass
Morone chrysops × saxatilis
13 observations
Invasive
Tiger Muskellunge
Esox masquinongy × lucius
12 observations
Iowa Darter
Etheostoma exile
11 observations
Frequently Asked Questions
- The 10 most common fish in Colorado are:
- Brook Trout (Salvelinus fontinalis)
- Rainbow Trout (Oncorhynchus mykiss)
- Rocky Mountain Cutthroat Trout (Oncorhynchus virginalis)
- Brown Trout (Salmo trutta)
- Bluegill (Lepomis macrochirus)
- European Carp (Cyprinus carpio)
- Largemouth Bass (Micropterus nigricans)
- Creek Chub (Semotilus atromaculatus)
- Green Sunfish (Lepomis cyanellus)
- White Sucker (Catostomus commersonii)
- The most observed fish in Colorado is Brook Trout (Salvelinus fontinalis), with 1,199 recorded observations.
- Some of the most commonly observed invasive fish in Colorado include:
- Arctic Grayling (Thymallus arcticus)
- Tiger Muskellunge (Esox masquinongy × lucius)
- Some of the most commonly observed native fish in Colorado include:
- Speckled Dace (Rhinichthys osculus)
- Longnose Sucker (Catostomus catostomus)
- Roundtail Chub (Gila robusta)
- Flannelmouth Sucker (Catostomus latipinnis)
- Bluehead Sucker (Pantosteus discobolus)