Preheat the oven to 425 degrees Fahrenheit.
In a small bowl, combine the butter, salt, pepper, garlic, and cilantro. Brush the mixture over the fish.
Sprinkle the pecans over the fish, pressing lightly.
Place the filets in a lightly greased baking dish and bake at 425 degrees Fahrenheit until the fish flakes easily with a fork, about 10 to 15 minutes.