Preheat your oven to 400°F (200°C).
In a medium mixing bowl, combine the avocado oil, lime zest, lime juice, minced garlic, chili powder, paprika, dried oregano, black pepper, and sea salt. Whisk until well combined.
Place the cod fillets in the baking dish and pour the marinade over them, coating evenly. Marinate for at least 15 minutes.
Bake the cod for about 15-20 minutes, or until it flakes easily with a fork and is opaque throughout.
Let the cod rest for a few minutes before serving. Garnish with lime wedges or fresh herbs if desired.