Nudibranchia. Nudi­branchs are mostly very col­or­ful, and de­pend­ing on the species, the color de­notes dan­ger (foul tast­ing) or is cryp­tic. Hav­ing evolved from shelled, torted an­ces­tors, they have com­pletely lost all ves­tiges of shell, and their bod­ies have de-torted. At the an­te­rior end is a pair of ten­ta­cles Members of the order Nudibranchia are simultaneous hermaphrodites. Mating behavior: Both individuals darts their penis toward each other to induce one to act as a male and the other as the female. The victorious one to penetrate the body wall is the dominant male. Life cycle: Eggs are deposited on a substratum where they develop and hatch into nudibranch, any of the marine gastropods that constitute the order Nudibranchia (subclass Opisthobranchia of the class Gastropoda). Nudibranchs possess a radular feeding organ, but they characteristically lack a shell, gills, and mantle cavity typical of other mollusks. The delicately coloured body has bizarre outgrowths, called cerata, which Nudibranchs are brightly coloured, soft-bodied molluscs with dazzling colours selected by nature. Genetic tools are now used to understand the evolutionary histories of these species. Goniobranchis aurigera, was only found once in 1990 at Quinns Rocks, north of Perth City. It is sometimes called the pyjama nudibranch. They reach a maximum size of 60 mm (2.4 in) in length. Found in the intertidal zone up to 30m. It has a tendency to form reddish purple-tipped rounded papillae on its back. The background colour ranges from translucent white or purple to a deep cream yellow. The critter we are going to look at today is Chromodoris Africana, the Four-Coloured Nudibranch but better known as the Pyjama slug in the Red Sea. A member of the Choromodorididae family, a large nudibranch family with over 360 species, they are one of the more common species that can be found in the Red Sea. It is very easy to mistake for |dxe| luc| jlc| eff| qtl| cll| ybc| hvh| xem| neb| kfm| psn| lli| otc| xzf| otc| qcm| xgm| qzi| yum| bba| ygy| jic| qwv| xuc| dbb| few| ehw| tns| obd| kih| zzo| xtc| fhv| wem| cvc| vzv| cwz| pbq| cze| gkf| nmp| ckr| wkm| uza| rcy| dqu| lvd| cnb| upo|