This hot little number was photographed swimming around Similan Island, about 40 miles off the coast of Thailand, by someone working for Bottom Camera. Can you guess what it is?
It’s a nudibranch, a kind of animal also known as a sea slug, a shell-free mollusc. But what kind of nudibranch is it?
In order to find out, you could go to one of the following sources:
- Nudibranchs of the Indo-Pacific
- Nudi Pixel identification system
- Sea Slug Forum
Do not go to the Sea Slugs Anime Blog, unless you like drawings of creatures with really big eyes.
Anyone care to spend the last Saturday night of 2009 trying to figure out just what species of sea slug the photograph above shows?

Stiliger aureomarginatus?
That looks pretty close to me.
The antennea dont look right but thats as close as I could find. I am not sure how much variation occurs inside the same species in this group.
antennae could also be retracted bigger or smaller, according to internal slug pressure?