Can a fish blink?

No, fish cannot blink. They don’t even have an age for that. This is due to the fact that blinking is necessary for terrestrial animals. Thanks to this process, the surface of the eye is moistened, dust and other small particles are removed. Drying of the eyes is not terrible for fish, as well as dust in the eyes, since they live in an aquatic environment. Still, some fish had eyelids. These were transitional forms of fish. Over time, they were able to go ashore. These were already amphibians, which needed eyelids for the ground-air environment.