Cherry Coho
In the early days of my Pennsylvania youth, I thought that a salmon was a salmon was a salmon. That’s generally the way they were presented back then – in texts, on restaurant menus, in other contexts. Salmon. Gradually, (in large part thanks to outdoor sporting magazines given to me by my grandfather), I came to understand that there are seven species worldwide, and that’s not including the many genetically distinct races within those species.
As fascinating as this genetic plasticity is, the changes salmon undergo throughout their life cycle are equally captivating. On October 9, 2020, the Coho in the above photograph was no longer feeding. Her stomach and digestive track had atrophied to almost nothing. The salmon intercepted Barbra’s streamer for reasons fly anglers have long puzzled over. Meanwhile, day by day her roe sacks were swelling, her scales were being absorbed into skin which was becoming thicker and more leathery, the tip of her jaw was developing a distinctive hook known as a kype, and the silvery sheen along her flanks had begun taking on a pallet of color worthy of fine art. (Nikon D800, 105mm f/2.8, 1/50, ISO 250)
I don’t understand. Is this normal?
Hi Chef. Yes, the changes are a normal part of the Coho’s lifecycle. All six species of Pacific salmon go through dramatic morphological changes, including wild changes in color, scale and skin composition, and dramatic changes to both internal and external physical characteristics. Shortly after spawning, all Pacific salmon die and their decayed bodies become part of the nutrient load in the rivers where there young hatch. Perhaps in a future article I’ll show in more detail the changes these fish go through. It’s, I think, one of the most astonishing things in nature.
Great description of the cycles throughout the salmon’s life. Nature is incredible!
I’ve learned a good deal since moving here. The transformations these fish go through are incredible – and still not completely understood.