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Numerous scales; one dorsal fin plus one adipose fin; no spines in fins; irregular black spots on back, both lobes of tail fin, dorsal fin, and adipose fin; gums black at base of teeth. In the ocean, chinook salmon are blue, green, or gray on the upper side, silvery-white on the flanks and belly. During the spawning season, chinook salmon are olive brown, red, or purplish, the color change being...