In a small bowl, mix together the mayonnaise, lime juice, honey, salt, and pepper to make the slaw dressing.
In a large bowl, combine the shredded red cabbage, carrots, and chopped cilantro. Pour the dressing over the vegetables and toss to coat evenly. Set the slaw aside in the refrigerator while you prepare the fish.
Preheat the Blackstone griddle to medium-high heat.
Cut the fish filets into 1-inch wide strips and place them in a large bowl. Sprinkle the blackening seasoning over the fish and toss to coat evenly.
Drizzle avocado oil on the hot griddle and add the seasoned fish strips. Cook for 2-3 minutes on each side, or until the fish is blackened and cooked through.
Warm the corn tortillas on the griddle for about 30 seconds on each side.
To assemble the tacos, place a piece of blackened fish on each warm tortilla and top with a generous amount of slaw.
Serve the Blackstone Blackened Fish Tacos with lime wedges on the side for squeezing over the tacos.