You would think but apparently not. I have said I'm allergic to fish and then been served a salad with shrimp on it because "it's not fish". Many think fish is salmon, tuna, albacore, halibut etc. Shrimp, prawns, scallops, crab, mussels, lobster is NOT fish but seafood. I'm allergic to it all. When it's a life and death situation, you cover all your bases to avoid any misunderstanding.