In a small bowl combine your pineapple, onion, cilantro, vinegar and ground red pepper.
Spray a large nonstick skillet with your cookin spray an dheat over medium high heat. Sprinkle your salmon with blackened seasoning and salt and add to your skillet. Let cook for about 4 minutes on each side or until the fish is cooked through.
Serve your salmon topped with your pineapple salsa.