??Nudibranch

I would appreciate help with the ID on this creature, possibly a nudibranch. These are video screen grabs taken in the Komodo National Park on a day dive. It is about the same size as a moderate nudibranch and was alone. I am not sure if structures on the left of picture first picture are gills or eggs. I cannot find it in any of my critter ID books.

Thanks for your hellp

Roger Eve

To answer my own question. One of my BSoUP friends has suggested that this is a partly curled up sea pen with nudibranch eggs laid at its base. I think he may well be right :-)