White Fish Stock
You can make this stock with a variety of fish carcasses (from nonoily fish) or with just one type — whatever your seafood market can give you. This recipe makes more stock than you'll need for the fideos with mussels , but leftovers can be frozen and used for soups, stews, and sauces.
Cooks' note:
Stock keeps, covered and chilled, 2 days or frozen 1 month.