Shellfish, also known as crustaceans, are often cross-reactive. If you are allergic to one, you should try to avoid all of them. Also note that some individuals can experience an allergic reaction simply by inhaling the cooking vapors or handling fish or shellfish. Consult with one of our allergy specialists at NY Allergy & Sinus Centers. Different Types of Shellfish Abalone Barnacles Calamari Clams Cockle Crab Crawdads Crawfish Crayfish Cuttlefish Ecrevisse Escargot Geoduck Krill Limpet Lobster Mollusks Mussels Octopus Oysters Periwinkle Prawns Scallops Scampi Sea cucumber Sea urchin Shrimp Snails Squid Whelk Foods that Could Contain Shellfish Any food prepared at a seafood restaurant is likely to have cross-contact with shellfish.. Some examples are: Bouillabaisse Cuttlefish ink Fish stock Glucosamine Paella Seafood flavoring (crab extract, clam extract, etc.) Surimi Conclusion If you are asking yourself “what is a shellfish allergy?” , the specialists and associates at NY Allergy & Sinus Centers are here to help answer that question for you. We have access to the newest treatment & testing, and we offer convenient asthma & allergy clinics throughout NYC: Murray Hill, Midtown, Upper West Side, Chelsea, and Queens. Our doctors can also help you find relief for your respiratory allergies, nasal and sinus problems, ENT (ear, nose, and throat) symptoms, skin conditions, and asthma. We see adult and pediatric patients from all over the NYC area, including Manhattan, Queens, Staten Island, Brooklyn, and the Bronx. Call NY Allergy & Sinus Centers today at 212-686-4448 to make an appointment.