Blackfin cisco (Coregonus nigripinnis)

Scientific name: Coregonus nigripinnis Milner, 1874

Blackfin cisco (Coregonus nigripinnis)

The Blackfin cisco (Coregonus nigripinnis) is a freshwater fish of the family Salmonidae. Native range: North America, restricted to Great Lakes (Lake Huron in Canada-USA and Lake Michigan in USA) and Lake Nipigon in Canada.

Biology

Dorsal spines (total): 0; Dorsal soft rays (total): 9-11; Anal spines: 0; Anal soft rays: 10 - 13; Vertebrae: 56 - 59. This species is usually characterized by darkly pigmented fins and deep body. Body elongate, distinctly laterally compressed, and deep, the greatest body depth in front of the dorsal fin. Head triangular; eye large; snout blunt, its length usually greater than eye diameter; mouth terminal, lower jaw usually projecting beyond upper, sometimes equal to upper jaw, maxillary pigmented, and extending posteriorly to below the anterior edge of the pupil. Overall coloration dark silvery, with pink or purple iridescence on sides, back dark green to black and silvery below. Maxillary and mandible whitish but heavily pigmented. All fish typically black, particularly on outer half.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Coregonus nigripinnis
Family
Salmonidae (Salmonids)
Order
Salmoniformes (Salmons)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
39.0
Common length
33.0
Depth range
2–160 m (7–525 ft)
Environment
Freshwater; demersal; depth range 2 - 160 m
Climate
Temperate
Distribution
North America: restricted to Great Lakes (Lake Huron in Canada-USA and Lake Michigan in USA) and Lake Nipigon in Canada.
Conservation status (IUCN)
Extinct (EX)
Threat to humans
Harmless
Resilience
Low, minimum population doubling time 4.5 - 14 years (tmax=14)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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