lettuce nudibanch (i think)
I found a very small slug in my refugium that I'm assuming came with the algae on my liverocks.com rock. Its at most 1/2" and is green with purple ends on its antenae. I took some pictures but forgot to put the flash in my camera (d'oh) and now he's wandered off somewhere so its too late. It looks like he has little ruffles ... I think that he's a lettuce nudibranch? I doubt that I'll be able to find him but is he alright in the refugium? I also have two very small blue legged hermits and a brittle star in there.
Is there anything else that he could be besides a lettuce nudibranch?