Pat fillets dry with a paper towel. Spray with avocado oil spray and season with cajun seasoning.

Place fish in the air fryer basket. Air fry at 400F for 8 minutes.

Test fillet by using a fork to see how easily the fish flakes. If it does not flake easily, it needs more time. Flip it and air fry it for up to 5 minutes or until fish flakes easily.