In a shallow dish, combine vegetable oil, lime rind, lime juice, minced garlic, chili powder, cumin, and pepper. Whisk together thoroughly.

Add the catfish fillets (or tilapia) to the dish and turn to coat each fillet evenly with the marinade.

Let the fish marinate for 15 minutes, allowing the flavors to penetrate the fish.

While the fish marinates, prepare the pineapple salsa. In a bowl, combine pineapple salsa, pineapple tidbits, chopped coriander (or parsley), and dried chilies.

Preheat your grill to medium heat and lightly grease the grill grates to prevent sticking.

Place the marinated catfish fillets on the greased grill.

Grill the fillets for approximately 4 minutes on each side, or until the fish is cooked through and flakes easily with a fork.

Remove the grilled catfish from the grill and place each fillet on a serving plate.

Spoon the prepared pineapple salsa generously over the top of each grilled catfish fillet.

Serve immediately, and enjoy the combination of spicy catfish and sweet-and-spicy pineapple salsa.