Coregonus johannae
Deepwater Cisco
NS
GX
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Salmoniformes
Salmonidae (Trouts and Salmons)
Coregonus
Coregonus johannae (Deepwater Cisco)
Description
This species account was compiled from
FishBase (Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2025.)
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Characters
Body shape: fusiform / normal. Body elongate, moderately compressed laterally. Head relatively long, snout narrow, elongate; mouth terminal, lower jaw usually equal to upper jaw but may be longer or shorter. Overall coloration silvery with pink iridescence. Pale blue or green on back, becoming blue-green on the sides. Ventral surface silvery white. Pigmentation on premaxillae and on top of the head. Fins mainly clear or white, translucent, with lightly scattered pigmentation, pelvic fins immaculate. Striking features: none.
Distribution
North America: Extinct; formerly in the Great Lakes basin, Canada and USA (Ref. 1998).
Habitat Associations
Freshwater. demersal.
Biology
Formerly commercial important, but now extinct (Ref 12269).
Max length: 26.5 cm SL; common length: 27.5 cm TL.
Reproductive mode: dioecism; fertilization: external; nonguarders (open water/substratum egg scatterers); parental care: none.
IUCN Red List Status: Extinct (EX), assessed 2016-07-27. Resilience: Medium (Preliminary K or Fecundity.).
References
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Scott, W.B. and E.J. Crossman (1973) Freshwater fishes of Canada. Bull. Fish. Res. Board Can. 184: xi+1-966.
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott (1991) Common and scientific names of fishes from the United States and Canada. Am. Fish. Soc. Spec. Publ. (20):183 p.
IUCN (1990) 1990 IUCN red list of threatened animals. IUCN, Gland, Switzerland and Cambridge, U.K. 288 p.
Hugg, D.O. (1996) MAPFISH georeferenced mapping database. Freshwater and estuarine fishes of North America. Life Science Software. Dennis O. and Steven Hugg, 1278 Turkey Point Road, Edgewater, Maryland, USA.
Balon, E.K. (1975) Reproductive guilds of fishes: a proposal and definition. J. Fish. Res. Board Can. 32(6):821-864.
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