Shrimp’s will be considered a shellfish allergy and not a fish allergy. I know I know, some will argue the fact that a shrimp is a fish. In fact, shellfish allergy isn’t even the same as a seafood allergy. They are from different families of food, therefore being allergic to one does not necessarily make you allergic to the other. This can break down even further to one only being allergic to one type shellfish group and not the other. Crazy right, Shellfish actually breaks down into two groups: Crustaceans (shrimp, prawn, crab, crayfish, or lobsters) and Mollusks (clams, mussels, oysters, scallops, octopus, or squid).
The proteins within shellfish cause the body to overreact and the immune system releases chemicals like histamine to fight off this “infection”. Now, this certain allergy is one a person can not take lightly. The sad thing about this scientific fact is, the Federal Government gives manufacturers the option to list or not list if a product contains mollusk shellfish (clams, mussels, oysters, or scallops). Their genius reason is that mollusk shellfish is not considered a major food allergen. If it’s labeled “contains shellfish”, this only refers to crustacean shellfish and not cross-contamination risks with mollusks.
With all this being said, just be careful and pay attention to labels and to your allergies. Also just because you don’t have this allergy, doesn’t mean your body can’t develop an allergic reaction to it later.