Longjaw cisco (Coregonus alpenae)

Scientific name: Coregonus alpenae Koelz, 1924

The Longjaw cisco (Coregonus alpenae) is a freshwater fish of the family Salmonidae. Native range: North America, Great Lakes basin in lakes Huron and Michigan. Listed as Extinct in IUCN Red List 2004 and listed in Appendix I of CITES.

Biology

Dorsal spines (total): 0; Dorsal soft rays (total): 10-13; Anal spines: 0; Anal soft rays: 10 - 14; Vertebrae: 56 - 59. Body elongate, compressed laterally but robust. Head heavy, broad and short; eye moderate; snout broad, somewhat rounded; lower jaw heavy, usually projecting beyond the upper jaw, maxillary usually not pigmented, extending posteriorly to beyond the anterior margin of the eye. Overall coloration silvery with pink or purple iridescence, green or blue on back, silvery on sides and white below. Pigmentation on jaws and fins very light.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Coregonus alpenae
Family
Salmonidae (Salmonids)
Order
Salmoniformes (Salmons)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
45.6
Common length
26.7
Environment
Freshwater; demersal
Climate
Temperate
Distribution
North America: Great Lakes basin in lakes Huron and Michigan. Listed as Extinct in IUCN Red List 2004 and listed in Appendix I of CITES.
Conservation status (IUCN)
Extinct (EX)
Threat to humans
Harmless
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.13-0.24)

Sources

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

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