Freshwater ecosystems cover less than 0.02% of the Earths surface, but they provide habitat for more than 18,000 species of fish (Balian et al., 2008). Many of these fishes are imperiled, and we need to better understand habitat choice to better manage these species (FAO, 2016). Our knowledge of the effect of intraspecific interactions on habitat choice and foraging behavior is incomplete. We observed pairs of dominant and subordinate drift-foraging Dolly Varden in an Alaskan stream, and quantified intraspecific interactions as well as foraging behavior. Dominant individuals had higher foraging rates, occupied slower holding velocities, and were displaced shorter distances during bouts compared to subordinate individuals. Individuals initiated bouts more frequently from the downstream position, relative to the bout opponent. Dominant individuals were more likely to occupy the upstream position after a bout in relation to the subordinate bout opponent, which ensures dominants the first opportunity to capture drifting prey.