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(invertebrate zoology)
A larval stage characteristic of many groups of Crustacea; the oval, unsegmented body has three pairs of appendages: uniramous antennules, biramous antennae, and mandibles.



the plankton larva of numerous species of the family Crustacea. The body is unsegmented and has three pairs of appendages. In front of the mouth there are uniramous sensory antennules; in back there are biramous antennae and mandibles for swimming. The nauplius has a median eye. Between the mandibles and the anal opening there is a growth zone, where, as development progresses, the postnauplial segments with appendages develop.

References in periodicals archive ?
Smaller sensilla are abundant in the interspaces between the larger sensilla and have been figured most often on nauplius stages (Tokioka 1936; Rushton-Mellor and Boxshall 1994).
barbata are also present from 3rd naupliar to 6th nauplius stages (Chong and Sasekumar, 1994; Ronquillo and Saisho, 1997).
Daruber hinaus war die einzige infizierte Sorte die Nauplius Larve, die aus Panama importiert war.
Nauplius is a tiny Pyriform or pear-shaped tiny body possessing three pairs of appendages.
Stage Enzyme activity (abs/min/mg) Trypsin * Chymotrypsin ([dagger]) Nauplius 0.
Pero informes posteriores afirmaban que el brote estaba limitado a la provincia de El Oro, donde estaba provocando solo perdidas del 10%, o incluso que los finicos camarones infectados eran nauplius larvae importados de Panama (las importacions fueron prohibidas).
But subsequent reports claimed that the outbreak was limited to the province of El Oro, where it was causing only a 10% loss, or even that the only infected shrimp were imported nauplius larvae from Panama (Imports were banned.
Other negative effects caused by low pH include reduced hatching rate and nauplius development in copepods (Kurihara et al.
All the known members of the family Penaeidae have a similar life cycle: planktonic larval stages; including nauplius, protozoea, mysis, and postlarva; followed by juvenile and adult stages (Dall et al.