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Phyllidia willani
Phyllidia willani has a pale and granular background coloration, black lines on its dorsum that sometimes form swirls, four median notal tubercles, pale-colored foot and oral tentacles, and yellow rhinophores. This phyllidiid nudibranch looks similar to the following related species: P. ocellata, P. babai and P. exquisita. The first is distinguishable from this species by its gold dorsum. As for the second, it has a yellow-edged mantle which is not present in this species. Same goes for the third related species.
I spotted and photographed this nudibranch in October last year, thinking it was one I had already identified before, and that's why I've only now posted this here. Unfortunately, I wasn't able to record the depth of this spotting, but I do recall that it was about 2 to 2.5cm long.
Spotted on Oct 27, 2011
Submitted on Jul 6, 2012
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