soft coral eating nudibranch?

[bv_reefer]

well after losing almost 1/4 of my colony, i finally caught the critter who was munching on my coral, he'd just finished part of my finger leather coony and just as he was about to start feasting on my kenya tree colony i caught him. I still have not identified what exactly this thing is ut heres as best as a description as i can give:-exact same shape and movement as a nudibranch
-white in color everywhere -fancy flower shaped appendages all accross top of body -relatively slow moving(as far as critters go at least) -underside looks same as a snail or nudibranch

-if anyone can help me id this..thing..well appreciated