astronomy-to-zoology:

Chromodoris orientalis

…a colorful species of Chromodoridid nudibranch which is known to occur in Japan, Hong Kong, Korea and the surrounding areas. Unlike many Chromodoris spp. which sport blue and white coloration, C. orientalis possesses a white mantle with oval black spots. The endge of the mantle is yellow/orange in appearance which separates C. orientalis from the similar Hypselodoris placida, which often shows a blue band along with the orange/yellow.

Classification

Animalia-Mollusca-Gastropoda-Heterobranchia-Euthyneura-Nudipleura-Nudibranchia-Doridoidea-Chromodorididae-Chromodoris-C. orientalis

Image: Bernard Picton