ID the Nudi?

[NeuroticAquatics]

We had a power outage last night and while I was going through the house checking out all four tanks, I happened to discover this critter in my 60g Reef cube sump. I've never seen it, or one like it, before. Any ideas?

Center of the body was white and the "skirt" around the entire body was clear (photo makes it all appear much more white than it actually was). Seemed pretty flat all around. It was going towards the right on this picture.

 

[KJ]

Is there any chance that you can catch this nudi / flatworm/slug and put in a dark container and take a pic from the top for a better ID?

 

[NeuroticAquatics]

I will try tonight. I've never seen it before, so it might have been luck catching it as it was cruising by the front of the sump.