Prepare the Fish: Pat the white fish fillets dry. Mix chili powder, cumin, smoked paprika, garlic powder, onion powder, cayenne pepper, salt, and pepper to create a spice rub. Coat both sides of each fillet.

Cook the Fish: Heat a skillet over medium-high heat and add olive oil. Cook the seasoned fish for 3-4 minutes on each side until golden brown.

Make the Zesty Lime Crema: Whisk together sour cream, mayonnaise, lime juice, lime zest, minced garlic, and chopped cilantro in a bowl.

Prepare the Slaw: Combine shredded cabbage, carrots, and red onion in a bowl. Whisk lime juice, olive oil, sugar, salt, and pepper together. Drizzle over the slaw and mix.

Warm the Tortillas: Warm the corn or flour tortillas in a skillet for about 30 seconds on each side or microwave for 15-20 seconds.

Assemble the Tacos: Take a warm tortilla, layer it with slaw, add fish, and drizzle lime crema on top.

Add Toppings and Serve: Add optional toppings and serve immediately.