Nudibranch. Good or bad?

[>:(]

Yesterday I was watching my tank when I noticed two slugs I think are nudibranchs. I had never seen them in my tank before. They were less than half a centimeter long and near my zoas. I've yet to see any damage to my coral, but I pulled them and put them in a little cup. I've done some research and I can't really find a species that looks like them, although they are small so you know...

Anyway, here's a pic. Gotta love macro mode. Keep them or kill them?

 

[myfishhadbabies]

bad!! go search for more on ur zoas before it becomes an infestation.

 

[>:(]

Thanks! I thought they'd be bad. I only found one more. I'm searching hard. I haven't had any new additions to the tank so they must have come in as eggs on something a while ago.

I don't have a fish yet, so I was thinking of adding a sixline wrasse because I read they were natural predators of the nudibranch. It's 20 gallons,so from what I read the wrasse should be fine.

Hasta la vista, Nudi.

 

[reefkeeper]

BAD that kind anyways....some are ok but not that one