Six Pacific salmon species migrate back to Russia’s remote Kamchatka Peninsula to spawn, their shapes and colors changing dramatically as they move into fresh water. Sockeye, the most valuable kind, dominates traffic in the Ozernaya River.
You can see more fotos of animal migrations here:
http://photography.nationalgeographic.com/photography/photo-of-the-day/pacific-salmon-migrating/?source=link_fb20101107pod
And more about the Kamchatka Salmon here:
https://www.nationalgeographic.com/magazine/2009/08/?source=pod&_ga=2.242439051.881543143.1528309307-1297000277.1509030499