
Rinse milkfish to remove innards and drain well. Pat dry and season with salt and pepper to taste.
Dredge in flour until evenly coated.
In a pan over medium heat, heat about 1-inch deep of oil. Add fish and cook, turning as needed, until golden and nicely crisp.
Remove from heat and drain on paper towels. Debone and flake meat including the skin.
In a skillet over medium heat, heat about 1 tablespoon oil. Add onions and garlic and cook until slightly softened.,
Add bell peppers and chili peppers and cook, stirring regularly, until tender-crisp.
Add calamansi juice and seasoning sauce. Bring to a simmer.
Add flaked fish, stirring gently to combine. Cook just until fish is heated through. Season with salt and pepper to taste.
Transfer to a sizzling plate and garnish with chopped chili peppers as desired. Serve immediately.