Please HELP! what is this!?

[molodets]

Guys I am freaked out!
I looked at the glass and this is what i saw!!
what is that?!?!?!?
I didn't put it in!

 

[nikesb]

some type of nudibranch, i would take it out. probably came from your live rock or a coral. this is why i dip everything and look at it with a magnifying glass. also why i refuse to use live rock

 

[molodets]

For 3 month i didn't see them... and all of a sudden

 

[lsboogie]

look for little egg sacks hidden in your corals. Some of them are beneficial but one of the pros will have to identify this one.

 

[nikesb]

Quote:
Originally Posted by molodets http:///forum/thread/384837/please-help-what-is-this#post_3372828
For 3 month i didn't see them... and all of a sudden
exactly. i dont trust live rock at all, you never know what will pop up

 

[btldreef]

If I had to guess, I'd say zoanthid eating nudibranch, but this is a guess. It's definitely a Nudibranch and it probably came on a coral or live rock, which is why I QT everything, even corals, even after they get dipped.
You're probably not going to get a positive ID with that picture, but most hitchhiking Nudibranch's are coral eaters, so assume it's bad and get it out of your tank. By the way, if you have one, you probably have more.
One of the best hitchhiker guides available on the internet can be found here:
http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml

 

[molodets]

i also got something i don't know what
but it crawles very fast

 

[lmecher]

I agree, zoanthid eating nudibranch. They will take on the color of the zoas they have been eating. Mine were bright orange. Look with a flashlight after lights out. They lay in in your zoas. Easy to see when they close up. Be diligent, if you see one, there is sure to be more. These are nasty little buggers a good reason you should inspect new corals and dip them before adding them to your display. Good luck!