[ejwsr]

I just found this crawling across the glass. Is it reef safe or do I need to remove it?

[rlcline76]

Looks like a nudibranch to me. I have a mystery slug, so I have been on The Sea Slug Forum - Home Page, I would send you there to try and ID this guy specifically, but that would almost be cruel. Do you have anything for it to eat other than your corals?

[pyromaniac398]

that looks like the nudibranch that will eat aiptsia. If it is then you are on lucky person. It will go around eating any aiptsia it finds. Most people have to buy them. Thats my guess on what it is.

[reeffreak2007]

Hello everyone I'm new here but not new to reef keeping.That picture does not look like a Berghia nudibranch that eat Aiptasia.They look like zoo eating nudibranches.If you have zoos then they could of been introduce with them.The only way to get rid of them is to take all the zoos and freshwater dip them(1gal. in a separate container,temp. and ph set to the DT for 5-10 minutes then put all the zoos in QT for about a month).This will give any nudibranches left in the DT time to die,since like most nudibranches,they die fairly quickly without there source of food.If you have no zoos/palys then ignore everything I said earlier,they will die soon with no source of food.

***note,always wear gloves when handling corals especially zoos and I almost forgot,if you do freshwater dip check for eggsacks(white swirly sack),may need pull them out with tweezers**

Good Luck

[ejwsr]

Thanks everyone! I am on a search and destroy mission now.

The sad thing is that it is kinda cute. But not cute enough to eat my corals and get away with it.