To season the fish and shrimp: Make 3 slits with a sharp knife across the skin of the fish fillets. Devein and butterfly the shrimps. Season by lightly dredging in the spice rub mixture. Place in a flat dish, cover and keep in the refrigerator for at least 15 minutes and up to 24 hours.
To make the cilantro sauce, heat the oil over medium heat in a deep skillet. A