ID - Orange 'frilly' snail/nudi/etc?

[jjirsa78]

I've been watching this guy for a while, but couldn't see much of him until today... He usually hides below coral frags out of direct light. This morning was the first/only time I've ever seen him in the open, and it was before the lights came on ...

He's about an inch to an inch and a half, with a snail-like foot, and orange lacey/frilly top (for lack of a better description). The pictures are very poor, taken via cellphone (the 2 dark ones on my way out the door this morning).

Thoughts?

 

[greenbean36191]

My best guess from the pics would be Tritoniopsis elegans. It's a common hitchhiking nudibranch that feeds on leather corals. Be on the lookout for more because they're hermaphrodites and can reproduce in captivity.

 

[jjirsa78]

That's it - great ID, thanks

(Unfortunately, now I know what has to be done....)