Preheat oven to 400°F (200°C) and lightly grease a baking sheet.
Place pecan halves in a plastic bag and set it on a cutting board. Use a rolling pin to crush the pecans into coarse pieces.
In a bowl, combine crushed pecans, panko crumbs, salt, pepper, paprika, garlic powder, and chopped parsley.
Lightly coat each tilapia fillet with olive oil on both sides.
Press the fish into the pecan mixture, coating both sides evenly.
Place coated fillets on the prepared baking sheet.
Bake for 20–25 minutes, or until the fish turns opaque and flakes easily with a fork.
Serve the pecan crusted tilapia with fresh lemon wedges for a bright finish.