In this picture you can see a female king with three male kings battling for fertilization rights. We watched the female beat her body along the bottom of the river bed to wash away the small loose algae covered rocks leaving only the large rock pieces suitable for egg-laying. All the while the males chased each other around biting at each others sides and tails. At this point the salmon have swam 1000 miles from the ocean to reach their spawning grounds which is where they were born about five years ago. They have traveled 600 miles up the Yukon River from the ocean, 300 miles up the Tanana River, and then 100 miles up the Chena River.