Combine the avocado oil, lemon juice, lemon zest, minced garlic, chopped parsley, dried oregano, dried thyme, and sea salt in a zip-top bag or bowl.
Add the chicken thighs to the bag or bowl and toss or seal and shake to coat each piece evenly in the marinade.
Refrigerate the marinating chicken for at least 1 hour and up to 24 hours.
When ready to bake, preheat the oven to 375°F (190°C).
Transfer the chicken and any remaining marinade to a large casserole dish, arranging the thighs in a single layer skin-side up.
Bake at 375°F for 40 minutes, then increase the oven temperature to 420°F 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 briefly before serving.