The Alaska record being 26 lbs at 35 inches. The coho has black spots, confined to the back and upper lobe of the caudal fin only. They differ from kings in that the teeth emerge from a light gumline, pale white. Their life span is around 5 years, but most return after 2 to 3 years. They will all die after spawning.
Silvers eat herrings, sandlance, squid and other fish.
It obtains lengths to 45 inches. The Alaska record is 42 lb 3 oz. They are distinguished from Salmon by the spotting on the back and side below the lateral line, spotting on both lobes of the caudal fin and some spotting on the anal fin. Steelhead have a distinctive white anterior of the mouth. Not all steelhead die after spawning as the Pacific salmon do.