Grilled Fish in a Yucatecan Marinade

I wish more people were familiar with the cuisine of the Yucatán. What a pleasure to have seafood caught just hours before serving, marinated in a mixture of pungent citrus juices and chilies. While bitter orange is the traditional citrus, a combination of orange and lime will approximate its taste. Sometimes the fish is served with rice, beans, tortillas, or potatoes rubbed with some of the same marinade. This recipe makes enough marinade for 6 to 8 portions of fish (I like to use grouper,