Preheat the grill to medium high heat.
In a small bowl combine olive oil, lime juice, chili powder, cumin, coriander, garlic and salt.
Coat the fish with the marinade.
Grill in a non-stick grill basket or fish basket so the fish doesn't fall apart. Cook for 2 minutes, flip and then cook for 1-2 minutes longer.
Lightly grill the tortillas and serve with the fish.