1. Combine the fresh lime juice with the vegetable oil and soy sauce in a rectangular baking dish (not metal).
2. Add the fish, turn to coat, and set aside to marinate for at least 15 minutes.For lime sauce, in a small bowl, combine the mayonnaise, yogurt, lime juice, chipotle, and garlic. Season to taste with salt.For salsa, toss together peppers, onion, mango, cilantro, garlic, and lime juice in a bowl; season to taste with salt.
3. Remove fish from the marinade and grill or saute over medium-heat until cooked through and browned.
4. Let cool slightly then flake into bite-size chunks.To assemble, place a bit of fish on a warm tortilla, drizzle with the chipotle-lime sauce, and top with cabbage and mango salsa.