Which fish spends four years at sea and then makes a long exhausting upstream journey to lay its eggs in the same freshwater creek where it was hatched?

Here's why:

* Four Years at Sea: Salmon spend their juvenile years in freshwater streams before migrating to the ocean to feed and mature. This can take several years, usually around 3-4 years.

* Upstream Journey: When they're ready to spawn, they return to their natal stream, often traveling hundreds of miles upstream against strong currents. This journey is extremely demanding and many salmon die after spawning.

* Laying Eggs in the Same Creek: Salmon have an innate ability to return to the exact creek or river where they were hatched. They use a combination of senses, including smell, to navigate their way back.

Let me know if you'd like to know more about salmon!