01 - In a large bowl, combine green cabbage, red cabbage, carrot, and cilantro. In a small bowl, whisk together lime juice, mayonnaise, salt, and pepper. Pour over the vegetables, toss well, and set aside.
02 - In a small bowl, combine paprika, garlic powder, onion powder, thyme, oregano, cayenne, black pepper, and salt.
03 - Pat the fish fillets dry. Brush both sides with olive oil, then coat evenly with the blackening spice mix.
04 - Heat a large cast-iron skillet or heavy pan over medium-high heat until very hot. Add the fish and cook for 2-3 minutes per side, or until the outside is deeply colored and the fish flakes easily with a fork. Remove and let rest for a minute, then cut into bite-sized pieces.
05 - Mix sour cream, mayonnaise, lime juice, hot sauce (if using), and salt until smooth.
06 - Place fish pieces in each warmed tortilla, top with slaw, drizzle with crema, and garnish with extra cilantro. Serve with lime wedges.