Sockeye SalmonOncorhynchus nerkaWhere and when to see them

Sockeye salmon are Pacific salmon known for their silvery ocean appearance and striking red spawning coloration. Sea-going populations hatch in fresh water, grow in the Pacific Ocean, and return inland to reproduce. In the Columbia River basin, major spawning populations are associated with the Okanogan and Wenatchee systems, while the Snake River supports a much smaller, endangered population. Sockeye are important prey for wildlife and carry marine nutrients into freshwater ecosystems when they return to spawn. They also hold longstanding cultural and food value for Indigenous peoples throughout their range.

Size

Adults commonly reach 45–75 cm (18–30 in) in length.

Weight

Adults typically weigh 2–4 kg (4.4–8.8 lb).

Lifespan

Usually 3–5 years.

Status

Least Concern globally; individual populations may be threatened.

Young sockeye typically spend one or more years rearing in lakes before migrating downstream to the ocean. At sea, they travel in schools and feed in productive North Pacific waters. Returning adults use environmental cues, including their sense of smell, to find their natal waters. Columbia River sockeye migrate upstream through the main river and pass dams using fish passage facilities. Adults generally stop feeding after entering fresh water and rely on stored energy during their migration. Females dig gravel nests called redds, where eggs are laid and fertilized by males. Both sexes die after spawning, and their bodies provide food and nutrients for other organisms.

• Landlocked sockeye salmon are commonly called kokanee.
• Sockeye usually spawn only once in their lifetime.
• Their name comes from a word in the Indigenous Halkomelem language.
• Most young sockeye rear in lakes before heading to sea.

Wildlife opportunities depend on the river reach, water levels and species. River-specific viewing months have not been confirmed; general species seasons are not a local sighting forecast.

Sockeye use freshwater rivers and lakes as well as the North Pacific Ocean during their life cycle. Most sea-going populations depend on lakes for juvenile rearing, although some populations develop in river habitats. In the Columbia basin, the main river is primarily a migration corridor linking the ocean with inland spawning and nursery areas. Spawning occurs in suitable gravel in tributaries, lake outlets, and some lake-margin habitats where water supplies oxygen to the eggs. Cool water, accessible migration routes, and healthy nursery lakes are essential to their survival.

Juvenile sockeye in lakes feed mainly on zooplankton, supplemented by insects and other small invertebrates. At sea, they eat planktonic crustaceans, including copepods and krill, along with other small marine animals and some small fish. Their diet provides carotenoid pigments that contribute to their flesh color and red spawning coloration. Returning adults generally do not feed during their freshwater spawning migration.

Common name

Sockeye Salmon

Scientific name

Oncorhynchus nerka

Animal group

Fish

Size

Adults commonly reach 45–75 cm (18–30 in) in length.

Weight

Adults typically weigh 2–4 kg (4.4–8.8 lb).

Lifespan

Usually 3–5 years.

Status

Least Concern globally; individual populations may be threatened.

Identification

Ocean-phase and newly returning sockeye are streamlined and silvery, with a dark blue-green back and no prominent black spots on the back or tail. As spawning approaches, the body becomes red and the head turns greenish. Breeding males develop a hooked jaw and a more pronounced back profile. Silver-phase sockeye can be difficult to distinguish from other salmon at a distance, so color alone is not a reliable identification guide.