• Dem Bosain@midwest.social
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    10 months ago

    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.

    • mick@lemmy.world
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      10 months ago

      How do biologists determine that the lampreys migrated from the ocean versus being hatched/born in the Great Lakes?