If most bodies of water are filthy with poor visibility under just a few feet, how are fish and sealife able to see where they are going and what they are doing?

Question

I don’t mean very deep sea life which have lights and stuff, I just mean regular sea life that swims about in filthy water.

In: Biology

Answer 1

Fish can detect movement with their lateral line. Also Fish dont have human eyes, they evolved to see whats important and in different conditions.