1.In a large pot, on medium-low heat, melt the butter with the olive oil and saute the celery and onions until soft, about 10 minutes. Add all the rest of the ingredients except the seafood and fresh parsley. Simmer on low, uncovered, for one hour. Add a splash of water if the sauce gets to thick. Taste for salt and adjust if needed.
2.Add the seafood and simmer covered another ten minutes. Turn off the heat, and stir in the Italian parsley