Coregonus johannae (Wagner, 1910)
Deepwater cisco
Coregonus johannae
photo by Lyons, J.

Family:  Salmonidae (Salmonids), subfamily: Coregoninae
Max. size:  26.5 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  North America: Extinct; formerly in the Great Lakes basin, Canada and USA (Ref. 1998).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 9-11; Anal spines: 0-0; Anal soft rays: 10-16. 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.
Biology:  Formerly commercial important, but now extinct (Ref 12269).
IUCN Red List Status: Extinct (EX); Date assessed: 01 August 1996 Ref. (130435)
Threat to humans:  harmless
Country info:   
 


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