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Called "Kiiro Ibo Umiushi" in Japanese, a nudibranch that eats sponges.
http://reefguide.org/phyllidiaocellata.html
between four to ten black rings edged with white surround the ...
My previous spotting: http://www.projectnoah.org/spottings/7874227
Phyllidia willani has a pale and granular ...
The color and pattern variation across the geographical distribution of this ...