Why salmon fish go against the stream?

Here's why:

* Reproduction: Salmon are born in freshwater streams and rivers. They then spend most of their lives in the ocean, growing larger and stronger. However, when it's time to reproduce, they instinctively return to the very same freshwater streams where they were born. This is called homing.

* Upstream Journey: The journey upstream is incredibly challenging. Salmon must swim against the current, often navigating rapids and waterfalls. They expend a tremendous amount of energy and even risk injury to reach their spawning grounds.

* Survival of the Species: This instinctual journey ensures that salmon eggs are laid in the ideal environment for hatching and the young salmon have the best chance of survival. The freshwater streams offer protection from predators and a rich food source for the young.

So, salmon swimming against the stream is a vital part of their life cycle, guaranteeing the survival of their species.