Seafood stock is one of those things I just can’t deal with in a can; fresh is so far superior. If you happen to have some shrimp, crab or lobster shells, the process is actually pretty easy. A fish stock using whole fish heads can be a bit messier, so I’m going to recommend you go the shellfish route. This stock is a great base for soups and stews and for cooking risotto. Cook it down as a base for pasta sauces and sauces to top other seafood dishes.