Preheat oven to 425°. Place fillets on a baking sheet coated with cooking spray. In a small bowl, mix the mayonnaise, lime juice and zest, salt, onion powder and pepper. Spread mayonnaise mixture over fish. Sprinkle with bread crumbs; spritz with cooking spray.
Bake until fish just begins to flake easily with a fork, 15-20 minutes. Sprinkle with cilantro.