How do fish know where they are going in the ocean?

Question

I’ve been looking up about Orcas, and I realized, how the hell do fish know where they are going in the middle of the ocean when there are no physical markers? It’s just water in every direction and depths so deep you cant see the bottom. I need google maps and I’ll still get lost. Is it something about magnets?

In: Biology

Answer 1

I thought fish like salmon had some way of feeling magnetic poles, magnetoreception?

I think birds as well