Make mango salsa: Stir together the chopped mango, chopped onion, red bell pepper, lime juice, lemon juice, cilantro, and salt and pepper to taste.
Set aside and allow to sit at least 30 minutes.
Mix 1/3 cup flour, sweetened flake coconut, cumin, curry powder, salt and black pepper together on a plate.
In shallow bowl, whisk the egg with 1-tablespoon water.
Place the remaining 1/3-cup flour on a second plate.
Dredge the fish fillets first in the plain flour (shaking off excess), then in the egg mixture, and finely in the coconut mixture to coat both sides.
Heat the olive oil and butter over medium high heat, then sautÈ the fillets until browned on both sides and cooked though on the inside, about 2-3 minutes per side.
Serve fillets warm, top with mango salsa and serve with rice.