Nudibranch Help!

[FishSandwich]

What kind of Nudibranch is this and should I be concerned? it is about two millimeters long and seems a bit green in color.

All SPS are doing well, colorful and growing. One small bunch of zoas has been a but timid lately but another one completely fine.

Should I consider a wrasse and if so which is the best nudi-eater?

Thanks in advance for any help!

 

[scottv1025]

looks like a zoo eating one . but its a bit whiter

 

[disc1]

It looks like the ones that were eating my zoos.

 

[OregonReefer]

Looking from the bottom they are really hard to tell apart IMHO

Does it look like this from the top?

http://www.inlandaquatics.com/berghia.html