What happens to all the fresh water fish in a river that eventually empties into an ocean?

Question

Do fish just turnaround and say nope, not for me.

In: Planetary Science

Answer 1

Pretty much that, yeah. Fish are REALLY good swimmers and most rivers are actually pretty slow-moving, so it is of relatively little consequence to the fish that the river is moving at all. They can overcome the push and swim upstream just as easily as they can swim downstream so they can keep themselves in the same general spot their entire lives with ease.