Best answer
It is a baffling question if you come to think of it. Since you are not a fish,how can you tell? Fish can obviously see in the water. If they can’t they would be bumping into each other and crashing on rocks and corals all the time. But can fish see the water they are in? No,fish do not see water.
People also ask
How do fish see water?
Fish can see the water for a few reasons: Humans can see air because air is not visible to us, but water is. For example, if you go swimming, you would know it was water because you can see it.
Can fish see through glass?
But to answer the original question yes fish can see through the glass and they (mostly) have supurb eyesight, particularly good at tracking fast moving objects. Their depth of field is poor though. For most fish everything is a bit of a blur after a few feet.
How do fish see better than humans?
Overall, a fish eye is better adapted to see movement and contrast rather than actual detail. You could say that many fish are generally short sighted. Humans and many other animals adjust focus by changing the shape of the lens. Fish normally change focus by moving the lens closer to or further away from the retina, almost like a camera.
Can aquarium fish see in the dark?
Among the many odd questions aquarists ask is whether aquarium fish can see in the dark. Well, the straight and simple answer is NO! But there is a caveat.