Fish like roach that migrate between lakes and streams have larger eyes with bigger pupils, improving vision in low light.

Fish is quite delicious -- or at least, most parts of it. It's also highly nutritious, packed with healthy fats, and may help reduce the risk of heart failure, which is why the American Heart ...

If your fish has bulging eyes, don’t be alarmed. Popeye disease is common in pet fish, and in most cases, they will fully ...