The juvenile fish migrate upstream to their usual habitat as mentioned above.

Others may stop by, but those fish we found two days ago have migrated," Dan said.

However, fish no longer migrated to the facility, and it became ineffective.

When spring comes, the older fish migrate back into the estuaries to spawn, starting the cycle all over again.

The fish does not migrate and has a life span of about six years.

However, it is also found in northern Mexico, as the fish migrate south to warmer waters during the winter months.

In the winter, some fish migrate to these warmer waters.

At the end of the flood season, the fish migrate back downstream away from flooded waters.

But fish are not the only animals migrating to the countryside.

Thus, it is only as drifting larvae that the fish can migrate significant distances from where they are born.