ID strange white nudibranch-like invertebrate

claw_atticas

I've had my 44gal tank running for about a month now, put in live rock which were infested with some isopods and diatoms.
I was trying to capture some isopods I thought were Cirolanids, so I put the tank in total darkness for a few hours along with a trap. When I removed the trap and turned the lights on, there were several of these strange twin-tailed invertebrates apparently cleaning the glass. Pictures below

SKAustin

Looks like it may be Amphiscolops sp., They are reportedly harmless.