How Do Fish See? How Do Fish Sleep? How Do Fish Breathe?

How did the first fish get into the ocean? How do fish breathe under water? If you put a fish's head underwater, but not its tail, would it survive? How do fish get diseases? How do fish see underwater without googles? Why do fish swim when they are asleep? Do fish drink water? Do fish have ears? How are fish born? But Why visits the New England Aquarium in Boston to get answers to those and other questions kids have sent us about fish.