Unknown slug

Hi,

I hope that there is someone on this forum that can help me to identify this small slug.

The pictures are taken at 4 meters depth at Grand Hotel lagoon in Hurghada, Egypt

Regards

Peter

Its a Nudi. I have several pictures of it from Lembeh when I was there last month. Don't have my Nudi book with me but they are in it right at the end of one of the chapters. 1001 nudis.

It's a common opisthobranch (not a nudibranch), Philinopsis pilsbryi. The basic pattern is brown lines forming open circles on a white background. This page from the Sea Sug Forum shows several color variants. http://www.seaslugforum.net/showall.cfm?base=philpils

All the sea slugs are opisthobranchs. Nudibranchs are a subset of animals in the group which completely lack shells and most of which have gills which extend out of the body. Nudibranch actually means "naked gill".

I stand corrected.