A fresh chum can be difficult for someone who expects every salmon to have recognisable spots. DFO’s identification guide describes no black spots on the back or tail, a relatively narrow tail base and a pale mouth, although the tongue may be dark. It also notes a white tip on the anal fin.
As maturation proceeds, vertical bands become conspicuous, often purple or reddish on the sides. Males develop an exaggerated jaw and teeth. Those spawning changes explain familiar photographs, but a silver fish should not be ruled out simply because it lacks the dramatic bars.
Compare the whole fish with
coho,
pink and
sockeye. Coho generally show upper-tail spots, pinks have bold oval tail spotting, while sockeye also lack the obvious spotted tail and require a fuller comparison. Colour alone becomes less dependable as fish darken.
Learn local identification before fishing mixed salmon water. If a fish is uncertain, keep it wet and supported while you assess it, and do not make a retention decision from a single mark. The illustrated bars describe a life stage, not a feature required on every fish.