Animalia > Chordata > Actinopterygii > Scorpaeniformes > Cottidae > Cottus > Cottus cognatus

Cottus cognatus (Anadyr sculpin; Bear Lake bullhead; Cockatouch; Common slimy muddler; Miller's thumb; Northern sculpin; Slimy muddler; Slimy sculpin; Stargazer; Western slimy sculpin)

Synonyms: Cottus boleoides; Cottus chamberlaini; Cottus formosus; Cottus franklini; Cottus gracilis; Cottus kaganowskii; Cottus philonips; Uranidea boleoides; Uranidea formosa; Uranidea franklini; Uranidea gracilis; Uranidea hoyi; Uranidea quiescens
Language: Danish; French; German; Haida; Inuktitut; Mandarin Chinese; Russian

Wikipedia Abstract

The slimy sculpin, Cottus cognatus, is a freshwater species of fish belonging to the family Cottidae, which is the largest sculpin family. They usually inhabit cold rocky streams or lakes across North America, ranging from the Great Lakes, southeast Minnesota, northeast Iowa, southwest Wisconsin and northeast Canada. Slimy sculpins have also been found roaming the cold streams of eastern Siberia.They are commonly confused with their closely related relatives, Mottled sculpin (Cottus bairdi), and with tubenose gobys who are both freshwater fishes as well. The slimy sculpin is a nocturnal fish that usually spends most of its time on the stream bottom and seeks shelter under rocks and logs, especially during spawning season. When it swims, it sometimes appears to be “hopping” along the bottom
View Wikipedia Record: Cottus cognatus


Female Maturity [1]  3 years
Diet [2]  Omnivore
Adult Length [1]  4.7 inches (12 cm)
Brood Dispersal [1]  In a nest
Brood Egg Substrate [1]  Speleophils (rock cavity)
Brood Guarder [1]  Yes
Litter Size [1]  1,420
Maximum Longevity [1]  7 years

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Algonquin Provincial Park IV 1868802 Ontario, Canada
Arctic National Wildlife Refuge Ib 12402936 Alaska, United States
Bering Land Bridge National Preserve Ib 2823882 Alaska, United States
Champlain-Adirondack Biosphere Reserve 9859505 New York, Vermont, United States  
Glacier National Park II 953799 Montana, United States
Indiana Dunes National Lakeshore II 8272 Indiana, United States
Isle Royale Biosphere Reserve Ib 571799 Michigan, United States
Ivvavik National Park II 2382752 Yukon, Canada
Kluane National Park and Reserve National Park Reserve II 5463436 Yukon, Canada
Kootenay National Park II 341762 British Columbia, Canada
Mount Revelstoke National Park Ia 18 British Columbia, Canada
Nahanni National Park Reserve II 1309627 Northwest Territories, Canada
Niagara Escarpment Biosphere Reserve 470167 Ontario, Canada  
Prince Albert National Park II 976762 Saskatchewan, Canada
Pukaskwa National Park II 459860 Ontario, Canada
Queen Maud Gulf Bird Sanctuary Migratory Bird Sanctuary IV 15335601 Nunavut, Canada
Riding Mountain Biosphere Reserve II 762028 Manitoba, Canada
Saint Croix International Historic Site   Maine, United States
Saint Lawrence Islands National Park II   Ontario, Canada
Tuktut Nogait National Park II 5761538 Northwest Territories, Canada
Upper Miss. River Nat'l Wildlife Refuge National Wildlife Refuge VI 25823 Illinois, Iowa, Wisconsin, United States
Voyageurs National Park II 177960 Minnesota, United States
Vuntut National Park II 1076795 Yukon, Canada
Wapusk National Park II 2614324 Manitoba, Canada
Wood Buffalo National Park II 11038545 Alberta, Canada
Wrangell-St. Elias National Park and Preserve Ib 2476446 Alaska, United States
Yoho National Park II 317576 British Columbia, Canada


Prey / Diet

Amnicola limosus (mud amnicola)[3]
Bythotrephes longimanus (spiny waterflea)[3]
Daphnia galeata (waterflea)[3]
Diacyclops bicuspidatus[3]
Diporeia hoyi (amphipod)[3]
Leptodiaptomus sicilis[3]
Libellula quadrimaculata (Four-spotted Skimmer)[4]
Lithobates sylvaticus (Wood Frog)[4]
Myoxocephalus thompsonii (Deepwater sculpin)[5]
Mysis relicta (opossum shrimp)[3]
Sergentia coracina (chironomid)[3]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Alosa pseudoharengus (kyack)8
Coregonus albula (European whitefish)1
Coregonus clupeaformis (Common whitefish)5
Coregonus hoyi (Bloater)8
Coregonus zenithicus (Longjaw cisco)1
Gasterosteus aculeatus (Alaskan stickleback)1
Lepomis gibbosus (kiver)1
Lota lota (Thin-tailed burbot)1
Myoxocephalus quadricornis (Alaska fourhorn sculpin)8
Neogobius melanostomus (Round goby)1
Neosalanx pseudotaihuensis1
Oncorhynchus mykiss (redband trout)4
Osmerus eperlanus (European smelt)2
Osmerus mordax (Rainbow smelt)8
Perca flavescens (Yellow perch)8
Salvelinus alpinus (Arctic charr)1
Sander vitreus (Walleye)4


Gavia pacifica (Pacific Loon)[4]
Lota lota (Thin-tailed burbot)[3]
Micropterus dolomieu (Smallmouth bass)[3]
Oncorhynchus kisutch (coho salmon or silver salmon)[3]
Oncorhynchus mykiss (redband trout)[3]
Oncorhynchus tshawytscha (chinook salmon or king salmon)[3]
Salmo trutta (Brown trout)[3]
Salvelinus namaycush (American lake char)[3]
Sander vitreus (Walleye)[3]
Thymallus arcticus (Arctic grayling)[4]


Parasitized by 
Acanthocephalus dirus[6]
Apatemon gracilis[5]
Capillaria salvelini <Unverified Name>[6]
Crepidostomum cooperi[6]
Crepidostomum farionis[6]
Cyathocephalus truncatus[6]
Dactylogyrus buddi[6]
Diplostomum gasterostei[5]
Diplostomum spathaceum[6]
Echinorhynchus salmonis[6]
Eubothrium salvelini[6]
Gyrodactylus bairdi[6]
Haplonema hamulatum <Unverified Name>[6]
Ligula intestinalis[6]
Neoechinorhynchus pungitius[6]
Neoechinorhynchus rutili[6]
Neoechinorhynchus tumidus[6]
Proteocephalus pearsei <Unverified Name>[6]
Rhabdochona cotti <Unverified Name>[6]
Spinitectus gracilis <Unverified Name>[6]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
ECHO Lake Aquarium & Science Center

Range Map

Alaska (USA); America, North - Inland waters; Belaya; Canada; Columbia; Danube; Europe - Inland waters; Former USSR - Inland waters; Great Lakes; Mackenzie; Mississippi; Nearctic; North America: throughout most of mainland Canada and Alaska; Atlantic Slope drainages south to Potomac River in Virginia, USA; St. Lawrence-Great Lakes basin; upper Mississippi River basin in Wisconsin, Minnesota and Iowa, USA; upper Columbia River drai; North America: throughout most of mainland Canada and Alaska; Atlantic Slope drainages south to Potomac River in Virginia, USA; St. Lawrence-Great Lakes basin; upper Mississippi River basin in Wisconsin, Minnesota and Iowa, USA; upper Columbia River drainage in Canada and USA. Also in Siberia, Russia.; Palearctic; Russian Federation; St. Lawrence; USA (contiguous states); Yukon;



Attributes / relations provided by
1Frimpong, E.A., and P. L. Angermeier. 2009. FishTraits: a database of ecological and life-history traits of freshwater fishes of the United States. Fisheries 34:487-495.
2Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
3NOAA, Great Lakes Environmental Research Laboratory
4Making The Forest And Tundra Wildlife Connection
5Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access