one more Philippines nudi

I thought I'd identified this nudibranch as Phyllidia ocellata, but now I see that I'm wrong:

I couldn't find it on any of the slug websites I frequent, so if you could help out with an identification then I'd be grateful!

Richard.

Dear Richard,

we think your identification is correct. You can see more on Poppe-Images

It is common here in the central Philippines and apparently the black circles are quite variable.

Guido

Guido's right. It's the most variable of the "lumpy bumpy" nudibranchs but the combination of large white lobes, yellow body, & black circles is unmistakable.

Thanks, Guido and Leslie.

While researching this species for the web page I'm putting together, all the photos seemed to have yellow tubercles. However, now I see that the sea slug forum does mention that the tubercles can be yellow or white.

Out of interest, what function do the lobes perform?

Richard.