After hatching from the egg, one of three types of development can take place, depending on the species.

An excerpt from the article 22 facts about crustacean

Some crustaceans hatch in an adult-like form and grow with successive moulting (epimorphosis). Others hatch as a larva and produce successive body segments with each moulting (anamorphosis) and still others, as in insects, undergo a transformation that can consist of several larval stages (metamorphosis).