The lake and sea-run fish are silver coloured in summer with dark spots on the body.
This species has a bewildering array of different forms. Generally the fish have a square tail with radiating spots and a pink stripe may be present along the lateral line. There are spots all over the tail but the rest of the body is usually silver.
They are somewhat darker in colour, have a very large mouth and contrasting black and white stripes on their lower fins.
The sea run and spawning fish have a black mouth and gums, spots covering the whole tail and 15-19 anal fins.