Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow.
1 Larvae. 2  Early in development, most crustaceans go through a series of larval stages, the first being the nauplius larva, in which only a few limbs are present, near the front on the body; crustaceans add their more posterior limbs as they grow and develop further. 3  The nauplius larva is unique to Crustacea. Crustaceans can also be found on land; the most familiar are probably pillbugs or woodlice, which are a type of isopod. (Not every organism with “bug” in its name is an insect.). Most crustaceans live in the ocean, and are one of the pillars of the global marine ecosystem. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. The larvae of the Achelata (slipper lobsters and spiny lobsters) are unlike any other crustacean larvae. The larvae are known as phyllosoma, after the genus Phyllosoma erected by William Elford Leach in 1817. They are flattened and transparent, with long legs and eyes on long eyestalks. Crustaceans exhibit a number of larval forms, of which the earliest and most characteristic is the nauplius. This has three pairs of appendages, all emerging from the young animal's head, and a single naupliar eye. In most groups, there are further larval stages, including the zoea (pl. zoeae zoeæ or). zoeas A shed carapace of a lady crab, part of the hard exoskeleton. Body structure of a typical crustacean – krill. The body of a crustacean is composed of body segments, which are grouped into three regions: the cephalon or head, the thorax, and the pleon or abdomen. Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of the Achelata (slipper lobsters and spiny lobsters) are unlike any other crustacean larvae. The larvae are known as phyllosoma, after the genus Phyllosoma erected by William Elford Leach in 1817. They are flattened and transparent, with long legs and eyes on long eyestalks. Crustacea usually have separate sexes, and the eggs hatch into larvae. Crustaceans have three major body parts. They are, front to back: head, thorax, and abdomen. Generally, they have two pairs of antennae, two eyes, and three pairs of jaws on their head. Crustaceans include crabs, lobsters, crayfish, shrimp, krill and barnacles. They are relatives of insects. If the Arthropods are regarded as a superphylum, then the insects and crustaces would be phyla. There are three basic types of larvae found in crustacean groups. The larvae are seperated into groups and named by the appendages they use for swimming. Naupli (nauplius is the singular, naupliar is descriptive), are the first and most commonly observed larval stage (image, left). Two strategies are followed by various groups of crustaceans. A group is either direct developers that emerge from the egg fully formed and only increase in size as they mature, or they exhibit anamorphic growth. In anamorphic growth the morphology of the individual that emerges from the egg changes with each molt. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as zoea and nauplius. The larvae of the Achelata (slipper lobsters and spiny lobsters) are unlike any other crustacean larvae. The larvae are known as phyllosoma, after the genus Phyllosoma erected by William Elford Leach in 1817. They are flattened and transparent, with long legs and eyes on long eyestalks. Lobster larvae are more developmentally advanced than are the larvae of other crustaceans. The minute lobster larvae are freed from their mother's pleopods, they are ready to begin feeding, while most other crustacean larvae hatch in non-feeding stages, or naupliar stages (from the Greek, nauplios meaning sailor).  At its most complete, a crustacean's life cycle begins with an egg, which is usually fertilised, but may instead be produced by parthenogenesis. This egg hatches into a pre-larva or pre-zoea. Through a series of moults, the young animal then passes through various zoea stages, followed by a megalopa or post-larva. The larvae of the Achelata (slipper lobsters and spiny lobsters) are unlike any other crustacean larvae. The larvae are known as phyllosoma, after the genus Phyllosoma erected by William Elford Leach in 1817. They are flattened and transparent, with long legs and eyes on long eyestalks.
http://eol.org/info/444 https://en.wikipedia.org/wiki/Crustacean_larvae https://en.wikipedia.org/wiki/Crustacean https://en.wikipedia.org/wiki/Crustacean_larvae https://simple.wikipedia.org/wiki/Crustacea http://www.ucmp.berkeley.edu/arthropoda/crustacea/metamorphosis.html https://en.wikipedia.org/wiki/Crustacean_larvae http://www.lobsters.org/tlcbio/biology8.html https://en.wikipedia.org/wiki/Crustacean_larvae
what is crustacean larvae