In a large bowl or zip-top bag, combine avocado oil, lemon juice, lemon zest, minced garlic, chopped parsley, dried oregano, dried thyme, and sea salt.
Add the chicken thighs to the bag or bowl and turn to coat thoroughly with the marinade; seal the bag and massage to distribute the marinade evenly.
Refrigerate the marinating chicken for at least 1 hour and up to 24 hours for best flavor.
When ready to bake, preheat the oven to 375°F (190°C). Transfer the chicken and any remaining marinade to a large casserole or baking dish, arranging the thighs in a single layer.
Bake at 375°F for 40 minutes, then increase the oven temperature to 420°F (215°C) and bake an additional 5–10 minutes, until the skin is golden-brown and crispy and the internal temperature reaches 165°F (74°C).
Remove from the oven and let rest a few minutes before serving.