To make the slaw; stir together mayo and lime juice in a small bowl. Mix cilantro, jalapeño and cabbage slaw in a medium bowl and then toss with the mayo/lime mixture. Add a dash of salt & pepper and set aside.
To make the fish; combine flour and next 6 ingredients (through ground red pepper) in a shallow bowl. Dredge fish in mixture. Heat oil in a large cast-iron skillet over medium-high heat. Add fish to skillet; cook 2-3 minutes on each side or until desired degree of doneness.
Warm tortillas in a heated skillet. Divide fish and cabbage mixture evenly among tortillas. Serve with avocado slices and lime wedges.