Preheat your oven to 400°F (200°C).
Season the sea bass fillets generously with salt and pepper.
Heat the olive oil in your skillet over medium-high heat. Once hot, carefully place the sea bass fillets in the pan, skin-side down (if the skin is on).
Sear the fish for 2-3 minutes per side, or until golden brown.
Optional: If your skillet isn't oven-safe, transfer the sea bass to a baking sheet at this point.
Add the butter to the skillet and let it melt. Swirl the pan to coat the bottom.
Optional: Add the minced garlic to the pan and cook for 30 seconds, or until fragrant.
Add the lemon juice and capers (if using) to the pan and simmer for a minute, scraping up any browned bits from the bottom.
Optional: If you used a baking sheet, spoon some of the pan sauce over the fish.
Place the skillet (or baking sheet) in the preheated oven and bake for 8-10 minutes, or until the fish is cooked through. The flesh should be opaque and flake easily with a fork.
Remove from the oven and let the fish rest for a couple of minutes before serving.
Plate the sea bass and spoon the pan sauce over the top. Garnish with fresh herbs (optional) and enjoy!