Nudibranch?

[olipug]

Purchased a tree coral last week, and this morning I was mounting it into the LR and I saw a white, slug like creature, about 6mm long with feathery growths all over it. Is this a nudibranch? And if it is, what shall I do with it? Will it be harmful to my corals?
Cheers.

 

[DJ88©]

[moved]

 

[capncapo]

It could be a nudibranch. A picture would help to get you a positive ID.

I would remove it from your tank and take a good picture. If it is a nudibranch, very,very few nudis are not harmful.