How might the salmons journey relate to the concepts of survival of the fittest?

The salmon's journey exemplifies "survival of the fittest" through its remarkable adaptations for reproduction and survival. As they migrate upstream against strong currents, only the strongest and most resilient individuals reach their spawning grounds, ensuring that their genes are passed on. Those that can navigate obstacles and evade predators are more likely to reproduce, highlighting the importance of physical fitness and adaptability in natural selection. This cycle demonstrates how environmental challenges shape species and contribute to evolutionary success.