Brush the Mahi Mahi fillets with olive oil and season with salt and pepper.
Grill the fillets for about 4-5 minutes on each side, until cooked through and flaky.
Warm the corn tortillas on the grill for about 30 seconds on each side.
Assemble the tacos by placing a piece of grilled Mahi Mahi in each tortilla. Top with shredded cabbage, pico de gallo, and chopped cilantro. Serve with lime wedges on the side.