As shown in the photos, this recently described nudibranch shows great variation in the black lines and the spots between individuals. The gills and rhinophores (antennas) are normally orange and there is always a black spot or line between the rhinophores. This speices is only known from Hong Kong, Philippines, Indonesia and Borneo.

Juvenile of this nudibranch often has orange rhinophores and gills, while the adult's are green. This species has a distinctive habit of raising the front of the head and vibrating the gills as it moves.

This species can grow to 5 cm in length. It is an active species and feeds mainly on sponges. In Hong Kong, it primarily occurs in Double Haven and Tolo Channel.

The white background with large black spots and orange border to the mantle are distinctive of this small nudibranch, which only reaches 3 cm in length. It is only currently known from Hong Kong and Japan.

This species is widely distributed and can be found under rocks and stones in almost all months of the year. It is active and feeds on asidians.

This nudibranch can grow up to 7 cm long. Although it can be found throughout most of the year, the largest individuals are found in summer. This active species feeds mostly on sponges.

This species is characterized by the tubercles over the surface of the body and the yellow line around the foot.

This nudibranch was observed on some stony corals Tasbastrea.

This species is common in local waters and throughout the Indo-Pacific. It feeds by secreting digestive enzymes into sponges and sucking out the partially digested tissue.

Colour of this species varies from brown and orange to the more characteristic black with pink edged-skirt. It feeds on sponges. Groups of this species were observed laying eggs in March.

This small nudibranch can be quite abundant on shallow rocky reefs in eastern waters. It may be new to science.

This nudibranch can grow up to 12 cm in length. This speices has not previously been recorded from Hong Kong.