Combine lime juice, oil, garlic, chili powder, cumin and paprika. Add fish and marinate in a glass baking dish for 15 – 30 minutes. Remove fish from marinade and saute over medium-high heat until fish flakes easily with a fork. Let fish cool slightly, then flake into bite-sized chunks. Warm tortillas in the microwave for 5 – 10 seconds, then top with fish, mango salsa and cabbage.