Can you develop a seafood allergy?

Yes, it is possible to develop a seafood allergy at any point in life, even if you have eaten seafood without any problems in the past. This is because allergies can develop over time, and a person may become sensitized to a food after repeated exposure. Seafood allergies are commonly triggered by proteins found in fish, shellfish, and crustaceans such as shrimp, crab, and lobster.