How large can the fairy shrimp Branchinecta gigas grow?

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The fairy shrimp Branchinecta gigas is the largest known living branchiopod, reaching a maximum length of 10 centimeters (3.9 inches).1

While they are often referred to as fairy shrimp, it is important to note that they are distinct from true shrimp, which belong to the order Decapoda. Fairy shrimp are members of the order Anostraca and lack the carapace found in many other crustaceans.21