Sea star (Asterias rubens) brachiolaria larvae stage (60 days old) A brachiolaria is the second stage of larval development in many sea stars; it follows the bipinnaria. Brachiolaria have bilateral symmetry, unlike the adult sea stars, which have a pentaradial symmetry. A number of starfish genera, such as Astropecten and Asterina, have no brachiolaria stage, with the bipinnaria developing directly into an adult. [size of single organism: 0,5 cm] | Brachiolarialarve von Asterias rubens Die Brachiolaria ist eine Larvenform der Stachelhäuter (Echinodermata), die in der Individiualentwicklung (Ontogenese) vieler Seesterne (Asteroida) vorkommt. Es handelt sich um eine anfänglich bilateralsymmetrische Form, die nach einer Metamorphose in den fünfstrahligen Seestern (pentamere Symmetrie) umgewandelt wird.
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![Sea star (Asterias rubens) brachiolaria larvae stage (60 days old) A brachiolaria is the second stage of larval development in many sea stars; it follows the bipinnaria. Brachiolaria have bilateral symmetry, unlike the adult sea stars, which have a pentaradial symmetry. A number of starfish genera, such as Astropecten and Asterina, have no brachiolaria stage, with the bipinnaria developing directly into an adult. [size of single organism: 0,5 cm] | Brachiolarialarve von Asterias rubens Die Brachiolaria ist eine Larvenform der Stachelhäuter (Echinodermata), die in der Individiualentwicklung (Ontogenese) vieler Seesterne (Asteroida) vorkommt. Es handelt sich um eine anfänglich bilateralsymmetrische Form, die nach einer Metamorphose in den fünfstrahligen Seestern (pentamere Symmetrie) umgewandelt wird.](https://m.psecn.photoshelter.com/img-get2/I0000OMs7.PxNQHM/fit=1000x750/10-11-18-152949-M-B-R-8-S-4.jpg)
