Loading species data...
Fetching observations
Rainbow Trout
Oncorhynchus mykiss
1,107 observations
Brook Trout
Salvelinus fontinalis
1,065 observations
Rocky Mountain Cutthroat Trout
Oncorhynchus virginalis
893 observations
Brown Trout
Salmo trutta
829 observations
Bluegill
Lepomis macrochirus
423 observations
European Carp
Cyprinus carpio
352 observations
Largemouth Bass
Micropterus nigricans
352 observations
Creek Chub
Semotilus atromaculatus
330 observations
Green Sunfish
Lepomis cyanellus
272 observations
White Sucker
Catostomus commersonii
157 observations
Fathead Minnow
Pimephales promelas
149 observations
Longnose Dace
Rhinichthys cataractae
147 observations
Western Mosquitofish
Gambusia affinis
133 observations
Invasive
Arctic Grayling
Thymallus arcticus
106 observations
Channel Catfish
Ictalurus punctatus
101 observations
Smallmouth Bass
Micropterus dolomieu
91 observations
Speckled Dace
Rhinichthys osculus
85 observations
Yellow Perch
Perca flavescens
80 observations
Black Crappie
Pomoxis nigromaculatus
69 observations
Rocky Mountain Cutbow
Oncorhynchus mykiss × virginalis
64 observations
American Gizzard Shad
Dorosoma cepedianum
61 observations
Longnose Sucker
Catostomus catostomus
60 observations
Tiger Trout
Salmo trutta × Salvelinus fontinalis
59 observations
Walleye
Sander vitreus
58 observations
Northern Pike
Esox lucius
49 observations
Brook Stickleback
Culaea inconstans
49 observations
Sockeye Salmon
Oncorhynchus nerka
49 observations
Goldfish
Carassius auratus
47 observations
Grass Carp
Ctenopharyngodon idella
47 observations
Greengill Sunfish
Lepomis macrochirus × cyanellus
43 observations
Black Bullhead
Ameiurus melas
39 observations
Mountain Sculpin
Cottus punctulatus
39 observations
Roundtail Chub
Gila robusta
38 observations
Lake Trout
Salvelinus namaycush
33 observations
Northern Plains Killifish
Fundulus kansae
30 observations
Red Shiner
Cyprinella lutrensis
27 observations
Pumpkinseed
Lepomis gibbosus
26 observations
Johnny Darter
Etheostoma nigrum
26 observations
Amur Carp
Cyprinus rubrofuscus
24 observations
Plains Sand Shiner
Miniellus missuriensis
21 observations
Golden Shiner
Notemigonus crysoleucas
20 observations
Plains Topminnow
Fundulus sciadicus
18 observations
Central Stoneroller
Campostoma anomalum
16 observations
Flannelmouth Sucker
Catostomus latipinnis
16 observations
White × Striped Bass
Morone chrysops × saxatilis
13 observations
Bluehead Sucker
Pantosteus discobolus
13 observations
Redear Sunfish
Lepomis microlophus
11 observations
Invasive
Tiger Muskellunge
Esox masquinongy × lucius
11 observations
White Crappie
Pomoxis annularis
10 observations
Iowa Darter
Etheostoma exile
10 observations
Frequently Asked Questions
- The 10 most common fish in Colorado are:
- Rainbow Trout (Oncorhynchus mykiss)
- Brook Trout (Salvelinus fontinalis)
- 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 Rainbow Trout (Oncorhynchus mykiss), with 1,107 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)