I first noticed this little guy in my 50 so I have had it for about a year and a half for sure. This is the first time I've ever really gotten a decent look at him in that time. It is about an inch long and looks like a flat nudibranch, with a mouth like a nassrius snail and two 1/4th cm antennas. did not really see eyes on it Unfortunately I have not gotten a chance to install my new end cap so my lights don't work yet.
The only nudibranchs I have seen like that are the ones that are sold to eat flat worms, but I think they've got a blue stile down them. Sent from my A100 using Tapatalk
A friend of mine ID'd it as a scutus. He has never touched my sponges and just walks around cleaning my rocks, which makes him a pretty sweet hitch hiker.