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Whitefish Key (Key to Adult Whitefish)
| 1a) |
Anterior dorsal rays long, when dorsal fin is depressed the anterior rays extend well beyond the posterior rays (Fig. 23A); caudal peduncle deep, about equal to width of dorsal fin base (Fig. A)
-> Lake Whitefish, Coregonus clupeaformis |
| 1b) |
Anterior dorsal rays relatively short, when dorsal fin is depressed the anterior rays barely reach the tips of the posterior dorsal rays (Fig. B); caudal peduncle narrow, less than width of dorsal fin base (Fig. B)
-> see 2 |
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Figure A |
Figure B |
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| 2a) |
Snout blunt when viewed from above (Fig. C); in our area, dorsal rays usually 8-10; adipose fin small, its base less than 1.5 times eye diameter
-> Pygmy Whitefish, Prosopium coulterii (non-game fish) |
| 2b) |
Snout pointed when viewed from above (Fig. D); in our area, dorsal rays usually 11-14; adipose fin large, its base more than 1.5 times eye diameter
-> Mountain Whitefish, Prosopium williamsoni |
Figure C |
Figure D |
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