A crustacean larva having three pairs of locomotive organs (corresponding to the antennules, antennæ, and mandibles), a median eye, and little or no segmentation of the body.

the first larval stage of the brine shrimp.

larval stage of many crustacean.

An early planktonic larval stage in many crustaceans.

Typically the earliest larval stage(s) of crustaceans; has only three pairs of appendages: antennules, antennae, and mandibles_all primarily of locomotive function.

The first planktonic larval stage of barnacles and some other crustaceans. The nauplius larva metamorphoses into the cypris larva.

A nauplius is the first larva of many kinds of crustaceans. It consists of a head and a telson; the thorax and abdomen have not developed yet. It has three pairs of appendages with which it swims; these become, in the adult, the antennules, the antennae, and the mandibles.