In a bowl, mix the coconut milk, lime juice, lime zest, garlic powder, cumin, salt, and pepper to combine the marinade.
Add the shrimp to the marinade and let it sit for 20 minutes to soak in the flavors.
Heat a large skillet over medium heat. Add the marinated shrimp to the skillet and cook for about 2-3 minutes on each side, or until the shrimp are pink and opaque. Remove from heat.
While the shrimp are cooking, warm the corn tortillas in a separate skillet or microwave until flexible.
To assemble the tacos, place a few shrimp on each tortilla, followed by a handful of shredded red cabbage and a couple of avocado slices.
Garnish each taco with fresh cilantro and serve with lime wedges on the side for an extra burst of flavor.