How do fishes navigate in the ocean? Because the sea floor is also very deep in the oceans it becomes even harder for them to create a map of the ocean inside their head. For migrating from one ocean to another they definitely need some map in their head. Also not all fish have sonar plus it has limited range and it even makes the job harder as the entire body of water surrounding a fish is constantly evolving
How do they create this map of the ocean inside their head ?
In: Biology
I know a stupid amount about odor plumes in water. They can play a big part in how sea animals navigate toward food and away from predators. Sharks in particular (and many fish I assume) use bilateral odor sensing, so they are able to tell by:
1) which side of their “nose” they smell the odor in first
2) how long it takes for the odor plume to reach the other nostril
3) how long the odor plume lasts in either side of their “nose”
In what direction and generally how far away prey might be. They use the same method of moving back and forth while they swim until they catch the scent of something that other animals do.
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