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.
"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.
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.
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.
One of the few dangerous shark for humans is the Bull Shark, they are very agressive and really attack everything, also humans. Even Spielberg regret the damage made by his Shark movie, relating the white shark as agressive killer monster, it isn't.
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)
33 replies
Can they even see above water? It would be just blurry view. They do it for fun, are they?
If you can see under water then why wouldn't they be able to see above water?
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.
This is the dumbest thing I've ever read. Holy.
What do you think makes vision blurry under water?
What makes you think fish and human eyes didn't evolve for their environment?
Lol, considering how they are right, I am wondering what you think makes vision blurry underwater
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.
...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.
"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.
You're certainly confident
Arrogant, even.
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.
I can't see under the water, because I'm in my bed
Big, if true.
Are you calling me a skinny liar?
...yes.
Thanks, I've been working on losing weight.
Not really.
I’ve been watching my figure
expand
Because they have shark eyes.
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.
Lookin fer' birds to eat.
Source - Ima shark.
Blåhaj is that you?
Muskies are basically freshwater sharks.
So, gonna go with… probably looking for a duck to eat, or something.
Orcas do it too
One of the few dangerous shark for humans is the Bull Shark, they are very agressive and really attack everything, also humans. Even Spielberg regret the damage made by his Shark movie, relating the white shark as agressive killer monster, it isn't.
https://www.youtube.com/watch?v=eHuzcR2vMac
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
also the fact that bull shark can survive in freshwater as well.
Who knew sharks were nosy fuckers.
He's got an eye on where you are as well as where you could flee to (If you were normal prey). Casing the joint lol
Dun-uhn....