- Rinse the fish in cold water and pat dry with paper towels. Using a sharp knife, make 3-4 cuts on each side of the fish. 
- Season the fish inside and out with salt and pepper. Rub the fish with the scallions and lime juice. Allow fish sit 10 minutes before cooking. 
- Dredge fish with flour to coat. Pour oil into a large frying pan. The oil should be at least 1 inch deep. 
- Heat the oil over medium-high heat, you can test it by dropping in a small cube of bread. If it sizzles and cooks, it is ready, or if you have a thermometer, the correct temperature is 375 F. 
- Carefully place the fish in the oil, standing back in case the oil splatters, then turn the heat to medium. 
- Fry the fish, without turning it, for about 5 to 7 minutes, or skin will break. Turn the fish and fry about 5 to 7 minutes more or until the skin is crispy. 
- Transfer to a plate lined with paper towels and serve with patacones, rice, avocado and lime wedges on the side.