Hypselodoris bullockii
Hypselodoris bullockii is a species of colorful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris bullockii is quite variable in color. What may be another species has been named Hyselodoris apolegma; it looks quite similar to this species and may turn out to be merely a different color form of Hypselodoris bullockii.
This nudibranch is found in the Tropical Western Pacific Ocean and the eastern Indian Ocean.
Source: en.wikipedia.org/wiki/Hypselodoris_bullocki - 20.09.2011
Hypselodoris bullockii
The Hypselodoris bullockii is an especially variable species of the nudibranchs.