Rinse fillets and pat dry with paper towels. Season to taste with salt and pepper; set aside.
In a small bowl combine butter, garlic, and salt and pepper to taste. Spread evenly on top of each fillet.
Heat oil in a large nonstick skillet over medium-high heat. Place fillets skin side down in skillet; cook 4 minutes per side or until crisp and golden. Sprinkle with thyme, and serve.