In a small bowl, combine all seasoning ingredient.
Heat a cast iron skillet on high heat for about 10 minutes (without oil).
In a mixing bowl, Dip each fish fillet into melted butter, coat each side with spice mixture.
Transfer the fish to the skillet. Sprinkle with some of the remaining spice mixtures if any.
Add one teaspoon melted butter over a fillet and cook for about 1-2 minutes. Repeat this step on the other side of the fish fillet and the remaining fish.