Anadromous Steelhead and resident Rainbow Trout interactions

This video captures both the resident and anadromous forms of (Oncorhyncus mykiss) Rainbow Trout in a small tributary in the upper Cowlitz River Basin, Washington during spawning season. The male Rainbow Trout exhibits a courting behavior as it quivers against the side of the larger female (HOR) hatchery origin steelhead. The female steelhead carries our implanted radio transmitter which can be seen as the white antenna exiting from her mouth.