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
Some use echolocation like dolphins (not fish, ik, just an example). Others probably depend on light and sound sources, depth. Or maybe, philosophically, they don’t have a destination and they are just free flowing
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