Sticky fish picture

When the light reflected by fish enters the air from the water, it is refracted on the water surface, and the refraction angle is greater than the incident angle. Refracted light enters the eyes, but when the eyes look in the opposite direction of refracted light, they feel that the fish is shallow, but what they actually see is a virtual image of a fish on the high side, so the orangutan tries hard to stab the water with a spear, but it will not succeed.

So, the answer is: shallow; Refraction.