Once the mature fish re-enter rivers to spawn, they modify in colour and appearance. Some populations of this fish only migrate to large lakes, and so are "landlocked", spending their entire lives in freshwater. These populations are observed all over the variety of the species. Not like Pacific species of https://mylesjwgpy.bloggadores.com/31204709/the-smart-trick-of-live-atlantic-salmon-for-sale-that-nobody-is-discussing