What fish makes a long journey to reproduce?

There are many fish that make long journeys to reproduce, but some of the most famous examples include:

* Salmon: These fish are known for their epic journeys from the ocean to their natal rivers to spawn. They can travel hundreds or even thousands of miles upstream, overcoming rapids and waterfalls, before returning to their birthplace to lay eggs.

* Eel: European eels, for example, spend their adult lives in rivers and lakes, but travel all the way to the Sargasso Sea in the North Atlantic to spawn. They then die after spawning, and their offspring return to Europe in a journey that can take years.

* Tuna: Some tuna species, like the bluefin tuna, undertake massive migrations across oceans to reach their spawning grounds. These journeys can be thousands of miles long.

* Sea turtles: While not technically fish, sea turtles also undertake long journeys to return to their nesting beaches. They can travel across entire oceans to lay their eggs.

These are just a few examples, and there are many other fish that make significant journeys to reproduce. These journeys are often driven by a combination of factors, including temperature, food availability, and the need to find safe spawning grounds.