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Numerous scales; one dorsal fin plus one adipose fin; no spines in fins; small black spots on back and upper lobe of tail fin; no dark pigment along gum line of lower jaw; gill rakers rough and widely spaced; lateral line nearly straight. In the ocean, coho salmon are dark metallic blue or greenish on the upper side, with silver sides and a whitish belly. During the spawning season, males are du...