Animals

Underwater view of a sockeye salmon (Oncorhynchus nerka) spawning pair and a sneaker male in Power Creek near Cordova, Alaska in the summer; Alaska, United States of America

Underwater view of developing sockeye salmon (Oncorhynchus nerka) eggs in Power Creek near Cordova and Prince William Sound; Alaska, United States of America

Underwater view of migrating pink salmon (Oncorhynchus gorbuscha) in Eccles Creek near Cordova, Alaska in the summer; Alaska, United States of America

Animals

Animals

Underwater view of a male pink salmon (Oncorhynchus gorbuscha) in Eccles Creek near Cordova, Alaska in the summer; Alaska, United States of America

Underwater view of a pink salmon (Oncorhynchus gorbuscha) spawning pair in Hartney Creek near Cordova, Alaska in the summer; Alaska, United States of America

Underwater view of a coho salmon (Oncorhynchus kisutch) spawning in Power Creek near Cordova, Alaska in the autumn; Alaska, United States of America

Underwater view of a pink salmon (Oncorhynchus gorbuscha) spawning pair with an aggressive sneaker male gaping in Hartney Creek near Cordova, Alaska in the summer; Alaska, United States of America

Underwater view of migrating pink salmon (Oncorhynchus gorbuscha) in Hartney Creek, with a Dolly Varden trout (Salvelinus malma) lurking near the bottom, near Cordova, Alaska in the summer; Alaska, United States of America

A female Sockeye Salmon (Oncorhynchus nerka) attacks another female, underwater view in an Alaskan stream during the summer.

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

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

A female Sockeye Salmon, also known as Red Salmon (Oncorhynchus nerka) attacking a female who is excavating a redd that is too close to hers in an Alaskan stream during the summer; Alaska, United States of America

Anticipating spawning, male Coho Salmon, also known as Silver Salmon (Oncorhynchus kisutch) approach a female probing her redd in an Alaskan stream during the summer; Alaska, United States of America

Underwater view of caddisfly larvea consuming a sockeye salmon carcass in Power Creek near Cordova, Alaska in the summer; Alaska, United States of America