Deepwater Sculpin
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Name and Code
Cottidae - sculpins
Myoxocephalus thompsonii
Taxonomic Authority
(Girard, 1851)
Common Name(s)
Deepwater Sculpin
French Name
chabot de profondeur
Family TSN
Parent TSN
Species TSN
Conservation Status
Global Rank (GRank)
G5 (2015-08-18)
National Rank (NRank)
N5 (2015-08-18)
Provincial Rank (SRank)
S3? (2011-05-06)
Special Concern* (Apr 2017)
SARO Status
Not at Risk
AFS Status
Ecological Value
Ontario Origin
General Abundance
Economic Importance
forage fish
Habitat and Feeding
General Habitat(s)
Trophic Class
Thermal Regime
Habitat Preference
cold bottom waters of the hypolimnion, on soft sediments in deep lakes; usually at depths between 60-150 m in the Great Lakes; preferred water temperature range 4-5°C
Reproductive Guild
Guarders: Nest spawners: Lithophils
Spawning Habitat(s)
Spawning Season
Spawning Month(s)
Spawning Temperature (°C)
Nursery Habitat(s)
Size and Age
Adult Length (cm)
5.1-12.7 TL
Adult Weight (kg)
Age at Maturity (yrs)
2 (m); 3 (f)
Maximum Length (cm)
23.5 TL
Maximum Weight (kg)
Lifespan (yrs)
Ontario Range Map
Deepwater Sculpin range
Ontario Distribution
Great Lakes (Superior, Huron, Ontario) and a few widely scattered inland lakes throughout the province
Deepwater Sculpin photograph
* - Great Lakes - Western St. Lawrence populations; probable year-round spawning occurs in the Great Lakes; only larval fish reported from Lake Erie; Great Lakes individuals attain larger size than inland
Ontario Records
Record Length (cm)
18.4 TL
Record Weight (kg)
Information Sources
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COSEWIC. 2017. Canadian wildlife species at risk. October 2017. Committee on the Status of Endangered Wildlife in Canada. Gatineau, QC. iv + 119 pp.
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