Fish is good for you for three main reasons: it has high levels of protein, is easy to digest, and contains omega 3 fatty acids.
What are omega 3 fatty acids? I'm glad you asked because I finally found an explanation i understand!
They are thought to lower the blood pressure, to strengthen the immune system and to have positive effects on the development on the nervous system and the cardiovascular system.
(Taken from this article on Science Daily.)
I don't cook it a lot because I'm scared to overcook it. But we recently purchased a food thermometer that I'm loving, and I have no more excuses!