• Soup@lemmy.world
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    23 hours ago

    Or a fish! If there were, then people would be fish and sharks would not be.

    • Zagorath@aussie.zone
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      19 hours ago

      Fish could be defined as the most recent common ancestor of tuna and herring, and all of its descendants. That would exclude sharks and lungfish, but would include most other groups that we unambiguously recognise as fish, while excluding tetrapods.