Prepare the grill.
Season the fish with ¼ teaspoon each salt and pepper. Grill, uncovered, skin-side up (if the skin is on), until golden brown, 4 to 6 minutes.
Turn and grill until opaque throughout. Cooking times:Bass: 6 to 8 minutes moreCatfish: 3 to 4 minutes moreArctic char: 4 to 6 minutes morePollock: 3 to 5 minutes moreMackerel: 3 to 4 minutes more
Serve with Tomato and Pesto Sauce, Harissa Mayo, Thyme and Orange Marmalade, or Caper-Parsley Tapenade.