Michael Quinton / Dolly Varden (Salvelinus malma) juveniles, Alaska

Michael Quinton / Chinook Salmon (Oncorhynchus tshawytscha) spawning with non-native Bull Trout (Salvelinus malma malma) feeding upon eggs, summer, Alaska

Matthias Breiter / Great Blue Heron (Ardea herodias) with Bull Trout (Salvelinus malma malma), in creek in Great Bear Rainforest, British Columbia, Canada

Shane Gross / School of Dolly Varden trout (Salvelinus malma) swimming upriver, Prince William Sound, Alaska, USA, Pacific Ocean.

Shane Gross / School of Dolly Varden trout (Salvelinus malma) swimming upriver, Prince William Sound, Alaska, USA, Pacific Ocean.