this post was submitted on 11 Jan 2024
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Lampreys are the greatest explorers among saltwater fish. They've mapped most of deepest darkest Greatlakesica, but most don't make it back out to report their findings.
How do biologists determine that the lampreys migrated from the ocean versus being hatched/born in the Great Lakes?
Accent. You can take the fish out of the ocean but you can't take the ocean out of the fish.