That depends on the fish.
assitant
I could draw you a diagram of what the fish looks like with the skin still on it.
assistant
What is the best way to skin a trout?
user
To skin a trout? Well, in some places the fishmongers skin them for you.  In other places they will probably require that you do it yourself, or they will give you the skins and you can do it yourself.  Some people use a gutting knife.  Some people use their hands.  I could draw you a diagram.
assistant
Do I start at the head or tail?
user