Daphnia belongs to the class:

Explanation

Crustaceans form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. A crustacean has the following features: • a segmented body with a hard exterior (known as an exoskeleton) • jointed limbs, each often with two branches (termed biramous) • two pairs of antennae. • gills.