Sockeye Salmon (Oncorhynchus nerka) spawning pair just upstream of a culvert (in background) in Alaska during late spring. The female has a putative lamprey scar.

Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) spawning pair in an Alaskan stream during the summer; Alaska, United States of America

Underwater view of King Salmon (Class Actinopterygii) in Moose Creek, a tributary of the Deshka River, South-central Alaska; Alaska, United States of America

Close-up of female set-netter picking a red salmon from her net near Seldovia, South-central Alaska; Alaska, United States of America

Sockeye Salmon (Oncorhynchus nerka) spawning pair just upstream of a culvert (in background) in Alaska during late spring. The female has a putative lamprey scar.

Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) spawning pair in an Alaskan stream during the summer; Alaska, United States of America

A Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) pair in the act of spawning in an Alaskan stream during the summer; Alaska, United States of America

Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) probes her redd while a male guards in an Alaskan stream during the summer; Alaska, United States of America

Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) male crosses over a female as part of courtship in an Alaskan stream during the summer; Alaska, United States of America

Incidental tree branch bites can result from the aggressive behavior of male Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) competing to spawn in an Alaskan stream during the summer; Alaska, United States of America

Young girl holding a salmon in a set-net skiff, South-central Alaska; Seldovia, Alaska, United States of America

Young girl holding a fresh caught salmon while in her family's set-net skiff with her mother, Seldovia, South-central Alaska; Alaska, United States of America

Red Salmon in Russian River with fishermen in the background, Southcentral Alaska, USA