Pink salmon

Euryhaline fish (marine and freshwater) with regularly ossified skeleton. Body elongate, becoming deeper with age, spawning males developing a hump on back before dorsal fin. Tip of upper jaw reaching well behind eye; snout and lower jaw becoming strongly hooked in spawning males. Caudal fin slightly forked. Scales very small, 143-230 in lateral line. Colour silvery, almost without dark spots, but during spawning developing blotches on head, upper flanks and caudal fin, the colour almost black.