About Hypselodoris decorata (Risbec, 1928)
Hypselodoris decorata (Risbec, 1928) is a species of nudibranch. It has a translucent cream to pink body, with a broad brown band along the mantle edge and four thin opaque white lines running across its dorsum. Rows of red to purple spots lie between these white lines. Its anterior end is usually light purple, marked with white and dark purple spots. The gills have bright red-orange pigment on their apices and outer surfaces. The rhinophores are white, with two red bands on the club and an additional red band at the base of the club. This species can grow to a total length of at least 25 mm. It was previously classified as a colour variety of Hypselodoris maculosa, until an integrated study combining molecular and morphological analysis clarified its distinct species status. This nudibranch was first described from specimens collected in New Caledonia, and has also been reported from the Marshall Islands, Vanuatu, Indonesia, Papua New Guinea, the Philippines, and Malaysia.
