The Magic Of Rubs And Marinades Fish tends to be rather mild tasting, so I like to jazz it up with a rub or marinade. A rub is a mixture of herbs, spices, and seasonings. One good rub for fish is equal parts salt, pepper, and chopped fresh or dried oregano, parsley, and rosemary. Sprinkle this mixture on the fish steak or fillet and rub it in with your fingers. Let it marinate for 15 minutes while you build your fire.
Marinades are good for dry fish, like tuna and wahoo.
The marinade keeps the fish moist during grilling and you can use any excess for basting. Yet another test is to cut a small slit in the top with the tip of a paring knife. Remember that fish will continue to cook even after you've taken it off the grill. As with so much in cooking, your final results will be only as good as the raw materials. Fish should smell fresh and clean, not fishy.