Back قد غروي Arabic اسقلبين غروى ARZ Cottus cognatus Catalan Cottus cognatus CEB Cottus cognatus EU Cottus cognatus French Cottus cognatus Croatian Cottus cognatus Dutch Cottus cognatus Swedish Cottus cognatus WAR
| Slimy sculpin | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Cottidae |
| Genus: | Cottus |
| Species: | C. cognatus
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| Binomial name | |
| Cottus cognatus J. Richardson, 1836
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| Synonyms[2] | |
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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.[3] They are commonly confused with their closely related relatives, Mottled sculpin (Cottus bairdi), and with tubenose gobies 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 because of its inefficient ability to swim. This is partly due to the absence of a swim bladder, which normally gives buoyancy to a fish.[3]
The fish has been studied in waters where there is current freshwater acidification. Sculpin were found to be less active and have lower rates of reproduction when found in these waters. For these reasons, slimy sculpin have been identified as a good indicator species for changes in acidification among lakes, ponds, and streams.[4]
- ^ NatureServe (2013). "Cottus cognatus". The IUCN Red List of Threatened Species. IUCN: e.T202658A15363317. doi:10.2305/IUCN.UK.2013-1.RLTS.T202658A15363317.en. Retrieved 15 January 2018.
- ^ Froese, Rainer; Pauly, Daniel (eds.). "Cottus cognatus". FishBase. August 2022 version.
- ^ a b Cite error: The named reference
[3]was invoked but never defined (see the help page). - ^ Gray, M. A.; Cunjak, R.A.; Munkittrick, K.R. (2004). "Site fidelity of slimy sculpin (cottus cognatus): insights from stable carbon and nitrogen analysis". Can. J. Fish. Aquat. Sci. 61 (9): 1717–1722. doi:10.1139/f04-108.