How do I remove Pinufius rebus on my yellow porites

[Chin_Lee]

I started seeing these guys on my yellow porites and I was wondering what they were

They camafloge very well with the porites because they are the same color and have the same polyp like bumps on their backs. Did a search on the internet and came across this article:
http://www.seaslugforum.net/factsheet.cfm?base=pinurebu

It doesn't say if its bad or good but my interpretation of

As the digestive gland contains particles of the sponge colony, which the nudibranch is eating, and the zooxanthellae, it has obtained from its food, Pinufius exactly matches the colour of the part of the Porites colony on which it is presently feeding.

tells me its probably BAD

Now how do I get rid of these guys? Does anybody know or have a good suggestion?

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