About Phyllidiopsis xishaensis (G.-Y.Lin, 1983)
This species of nudibranch, Phyllidiopsis xishaensis, has a blue-white back marked with four longitudinal black lines, with raised ridges between these lines. It is a small Phyllidiid that reaches a maximum length of approximately 20 mm. Black spots may sometimes appear in the area between the outermost black lines and the edge of the mantle. Its rhinophores are either lemon-colored or white. This species is similar in appearance to Phyllidiopsis annae; the key difference is that P. annae has black rhinophores, while those of P. xishaensis are pale. It is also similar to Phyllidiopsis phiphiensis, which differs by having only three longitudinal black lines on its mantle rather than four. This species was first described from specimens collected in China. It has also been reported from South Africa, Réunion, the Maldives, Malaysia, the Philippines, and the Great Barrier Reef, Australia.
