Pleas ID this critter

[ronbis]

There a few of these in my tank all of a sudden. Are they a pest? This one I photographed on the glass is about 3mm long. Thanks!

<a href="http://www.flickr.com/photos/22195434@N07/4435405937/" title="Mystery Bug by wapitipoker, on Flickr"><img src="http://farm5.static.flickr.com/4044/4435405937_16efff7d27_b.jpg" width="1024" height="712" alt="Mystery Bug" /></a>

 

[Sugar Magnolia]

That's a predatory aeolid nudibranch. It's a coral eater. http://reefkeeping.com/issues/2005-05/rs/index.php

 

[ronbis]

Uggh. Time to do battle! Thanks for the help.

 

[Sugar Magnolia]

You'll need to inspect everything for eggs, juveniles and adults. If you have seen several, then they are reproducing in your tank.

 

[ronbis]

They seem to be laying eggs only on my zoanthids. Luckily all i have are frags that aren't mounted yet. So I moved them all to my QT tank picking off a half dozen nudis on the way. The eggs are pretty hard to scrape off. I got most of them, but need to do another inspection today. I doubt that I got lucky enough to get them all out of my main tank.

 

[AJSTITAN14]

You need to go over to the Zoa forum and get some advice on dipping your Zoos.

 

[arioch]

Yeah, you're basically committed to dips of all your zoo frags, probably 3 sessions 3 weeks apart (yes, 2 month process) to catch the life cycle of these things.

 

[Fishinboy84]

how do you get rid of these things? my tank is coverd. what causes them?

 

[AJSTITAN14]

how do you get rid of these things? my tank is coverd. what causes them?

Ask in the Zoa forum those guys know the drill on these pests.