A fisherman friend of mine just brought me some fresh Mahi Mahi that he caught.  I always take advantage of any opportunity to get fresh caught fish. Freshness makes all of the difference in the flavor and texture of the fish.  He had already removed the head, tail, and fins but left the skin on.  When cooking fish, I often like to make a quick marinade to infuse the fish with flavor.  Today, I decided to go with a south of the border flavor using fresh lemon or lime juice,