Nudibranch ID help!

[Snarbleglarf]

So I just picked up some zoanthids from my lfs and I have found out that two of these guys hitchhiked their ways into my tank, after the research I have done online it seems it is a nudibranch but my question is, is this a zoanthis eating nudibranch that I should remove from my tank or a Berghia nudibranch that I should be happy I have? Any Info is appreciatied. Also while they are under the blue light it glows a red color on the top of his body

 

[Crabs McJones]

Possibly a zoa eating nudi?

 

[satttheman]

From what I've read nudibranchs take the color of what the eat. Never seen a red aiptasia [emoji1787]. So I'd say its probably some kind of coral eating nudibranch.

 

[ahiggins]

Unfortunately that is a zoa eating nudi. Most of the time you can ID it from the many little “legs” coming off it as the good ones usually only have one set on the head end. I’ve never had them so I can’t help much but that’s what you have.