Place the fillets in a shallow dish. To prepare the citrus marinade, combine the zest from both tangerines with tangerine juice, olive oil, white wine, herbs and black pepper in a small bowl; mix well.
Pour the marinade over the fish and marinate for 1-2 hours in refrigerator. Coat grill with vegetable spray and preheat on medium-high heat. Grill fillets for 4 to 5 minutes on each side until center is opaque and meat flakes easily with a fork.
Garnish with herbs and tangerine slices and serve.