Although they are the smallest Pacific salmon, averaging between 3 and 4 lbs (1-2 kg), pinks are by far the most numerous and most consistent spawners. Unlike other salmon, pinks have a strict lifecycle, returning to freshwater after two years in the ocean. These salmon can be identified by the large, black spots on their back and tail.
This fish is often called the humpy because of the distinct hump males develop on their back when spawning. The hump is thought to make the male look more impressive to potential mates and more intimidating to rivals.