Willie Lump Lump, they figured if they left out the acid, it was ok to marinade a few days in a plastic bag. You can marinate fish for a couple of days if you use fresh herbs and spices: crushed garlic, chopped ginger, ground toasted cumin seeds, chopped chili peppers, cilantro, bay leaves, and even a little fresh rosemary. Add a little olive oil, and your cooking. Just leave out the acid, ie. lemon juice, wine, italian dressing, etc.Hope this helps.