• Annoyed_🦀 @lemmy.zipEnglish
        29·
        5 days ago

        What i mean is they can’t see well while out of water, just like we can’t see well when we’re underwater. Our eye evolved to see above water, so when we try to see underwater, the water will mess up the light going into our eye, so everything would be blurry for us. The reverse is true for fish as well. So while they poke their head out as if they trying to take a peek, what they most likely see is blurry mess.

        • chloroken@lemmy.mlEnglish
          1·
          4 days ago

          This is the dumbest thing I’ve ever read. Holy.

          What do you think makes vision blurry under water?

            • chloroken@lemmy.mlEnglish
              2·
              4 days ago

              We see a blurry mess underwater because of the particulates in the water. Fish don’t see a blurry mess when they look through air.

              People being clueless is not my worry.

              • 5too@lemmy.worldEnglish
                6·
                4 days ago

                …so what happens when you use goggles? Or a camera?

                Lakes can be dirty, but you can see the same effect in a pool. Or your bathtub.

                • chloroken@lemmy.mlEnglish
                  1·
                  4 days ago

                  “Same effect” what effect? H2O has no special impact on vision. The gaseous atmosphere likewise has no effect on fish’s vision. Why the hell would either of these solutions affect vision? They’re essentially invisible. Have YOU ever opened your eyes in crystal clear water? You can see extremely far.

                  This entire thread is confused. What makes it difficult for land dwellers to see underwater also affects those animals that live underwater. The particulates and lack of light.

                  There is absolutely zero scientific basis for any of the ideas you’re offering.

      • sga@lemmings.worldEnglish
        22·
        4 days ago

        If i am not wrong, and iirc, they have different lens systems as compared to humans (or other land dwelling beings). For us, light goes from air to a lens made of “watery” substance and then through a (different) “watery” fluid in our eyes, and then to the back. whenever you have refractive index changes (air and water have different indices(water is ~1.33)), light bends, and so, the way light would refract differently, or in other words, the angle at which “focuses” (not the current optical term here, but works in a colloquial sense, angle of cone of focus would be better) is different if you have air-watery*-watery system vs water-watery*-watery system. since fish live in water mostly, they develop for the lattery system (since most of the system is water esque, there is not much refractive difference which would bend light at larger angles), so they would have to use a more “powerful” (not correct again, better would be shorter focus) lenses, or else there eyes and eye sockets would have to be large. so if they come above water, these “powerful” lenses would resolve the focus spot before the back of eye (so they would be myopic). inverse happens with land dwelling beings going in water.

        Amphibians (and some other “beings”) have some special “arrangements”. iirc, some frogs have an extra layer of “transparent eyelid” like thingy, that they close underwater, which gives the “additiional focussing power” required to resolve.

    • Bytemeister@lemmy.worldEnglish
      7·
      4 days ago

      Plenty of people swim with bullsharks and hand feed them. Sharks are dangerous when you act like easy prey. Easy prey bleeds, it struggles, and it turns away from the predator to flee. That white shark didn’t bite Valerie Taylor because there was easier food, and she was aware of the shark.

      Check the link for what happens when you act like prey around these animals. (Trigger warning : shark attack, if it wasn’t obvious)

      https://youtu.be/IogBpXY2VZQ

  • Fondots@lemmy.worldEnglish
    29·
    5 days ago

    I’ve known muskies to do something similar- swim around at the surface with their head out of the water.

    I remember looking into it, and it’s definitely a thing, but no one seems to know why exactly they do it. There’s a few theories that have to do with the oxygen concentration at the surface, regulating temperature, buoyancy, etc. but the one I personally like to subscribe to is the same as this, that they’re just looking around.

    It makes me feel a little less bad about not being able to catch one if they’re at least more intelligent and curious than the average bass or bluegill or whatever else I’m pulling out of their lake.