Update upon request from inhar_ali:
Here is the dry flour I use to coat the fish.
This fish-fry seasoned flour is very tasty. I use it on my fried chicken too.
1/4 cup rice flour
1/4 cup corn meal
3 tablespoon all purpose flour
1 teaspoon salt
1 tablespoon ground black pepper
1/2 teaspoon red chilli powder (if you like heat. if not you can use paprika)
Pat dry the fish after you wash it. I use zip loc bag to coat the flour. You could also coat the fish with the flour mix on a plate. Dust off excessive flour and fry the fish in deep fryer/wok/pan.