Fish do not eyelids. Why?

Question

Fish do not eyelids. Why?

Answer 1

Coz if they closed there eyes while swimming they would crash into stuff! haha

Answer 2

We use eyelids to release water into our eyes in order to keep them moist and wash away impurities

Because fish live in water they don't need the eyelids to wash water over their eyes and the water in their environment does this for them.

Answer 3

when your underwater with your eyes open u dont blink....

Answer 4

if they would have eyelids then obviously they would shut them while sleepin and if any predator fish sees it sleepin(as it eyes r shut) it would just eat it up so naturally fishes do not eyelids so that no one gets to know if its sleepin or not  

Answer 5

They don't need them.  The water and a coating cover the fish's eyes there fore they do not dry out nor do they ever need to close them since fish do not sleep.