They are vary bright I watched finding Nemo and I asked my self the same thing. If you see light can help us in many ways and even help us live! It's like it you eat 100 carots it helps you see in the dark weel with the fish there born with that sence.
how do the squid's eyes help it to survive?
cuz they want them
of course they have eyes
2 ways that Fish are adapted to living in water are gills and fins, or scales ( streamline) and protected eyes.
It keeps the eyes moist which keeps them healthy which lets us see properly which can help us survive.
see their food, see underwater
Gills
If the eyes face forward, this means a predator. If they are on the sides of the head, this means prey.
Fish have several adaptions to help them survive in the water. Firstly, they need gills to breathe, secondly, fins and a tail to help them swim and finally it is important for them to have a streamlined body.
The eye's location could help it survive because it gives them a good view of their surroundings. I'm not quite sure about the mouth! Sorry!
NO there is no animal that have their mouth above their eyes
Fish need oxygen to live.