01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a bowl, whisk together olive oil, lime juice, chopped chipotle peppers, adobo sauce, cumin, smoked paprika, garlic powder, salt, and black pepper until thoroughly combined.
03 - Pat fish fillets dry and arrange on the prepared baking sheet. Brush both sides evenly with the marinade.
04 - Roast fish in the preheated oven for 12 to 15 minutes, or until opaque and easily flakes with a fork.
05 - While fish is roasting, prepare cabbage, cilantro, red onion, and avocado. For crema, combine mayonnaise or sour cream, lime juice, minced chipotle in adobo, and a pinch of salt in a small bowl, whisk until smooth.
06 - Heat tortillas in a dry skillet over medium heat or microwave briefly until warm and pliable.
07 - Using a fork, gently flake roasted fish into large pieces for taco assembly.
08 - Fill each tortilla with flaked fish, then top with cabbage, cilantro, red onion, avocado, and a drizzle of chipotle lime crema. Serve with lime wedges.