The manca stage is the defining characteristic of a clade called Mancoida which comprises all the member of the Peracarida except the Amphipoda.
[1] Mancae closely resemble the adult form, but for the absence of the last pair of pereiopods.
[1] In some isopods, specifically the family Gnathiidae, the manca stage is a parasite of fish, and is also known as the praniza.
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