Nudibranch in Lembeh Strait, near Xenia coral

Another ID request from Lembeh!

This guy also appears to have a tiny shrimp riding on his back...

You're with Tony right? He should know it -- http://www.tonywublog.com/20100303/the-cra...nudibranch.html :-D

The name Marionia pustulosa is used for several different species in web pics. I got the id from Debelius & Kuiter's Nudibranchs of the World book. A lot of nudi specialists contributed to the book so I assume it's pretty good.

This one is clearly different - http://www.nudibranch.com.au/pages1/MARIONI1.htm It was photographed in part by Richard Willan who's a museum nudi specialist. This one's distinct too http://www.nudipixel.net/photo/00021926/ Lembeh Resort's image matches the one in D&K's book http://www.lembehresort.com/zoom.php?id=/i...0Kuzmin&cal

P.S. -- How about an enlargement of the shrimpie?

I shot it with insect eye, so it isn't the sharpest -- also, I didn't see the shrimp when I shot the photo, so I didn't bother going in for a closer shot!