Crustaceans

Crustaceans are mandibulate arthropods traditionally placed in the paraphyletic subphylum Crustacea, and they are mainly aquatic, including decapods such as shrimps, prawns, crabs, lobsters and crayfish, together with barnacles, krill, copepods and other groups. The cited article says 67,000 species have been described, that like other arthropods they have an exoskeleton which they moult to grow, and that more than 7.9 million tons of crustaceans per year are harvested by fishery or farming for human consumption, consisting mostly of shrimp and prawns. Ingredients the atlas records under the crustaceans allergen value are grouped under this entry.