Thingy/nudibranch in Tulamben

Hello, would you pls help me identifying that critter taken in Tulamben/Bali area not more than 2cm /1 inch I would say.

the image was cropped 30%, taken at relatively shallow depth some 10-12m on th eend of the dive. I couldn't even figure whether it was the back or the head of that thingy... I believe it should a kind of nudibranch, Melibe or Marionia or am I completely wrong?

Thanks for your help.

I thought that they might be Eubranchus type. There were a couple of different types like this around. I think that the head is at the other end of your photo.

Eubranchus spp. are common in European waters, but less so in the tropics.

Alex

Thanks for directing me on the right trails, Alex!

I found it : Eubranchus Virginalis is its name.

Thank you in return. I wasn't aware of the species name. Alex