Need help.. What is this ?

[jack_tx]

It moves and I can see a lot during night time.Will it hurt Coral / fish? How can I get ride of it ?View attachment 6162  

 

[jenkinscrew]

Kinda hard to tell, I am thinking flatworms or nudibranch maybe? What color are they? Maybe a better pic will help. Research those though and see if they look similar.http://www.melevsreef.com/articles/how-to-eliminate-flatworms-red-planariahttp://www.melevsreef.com/critter/montipora-eating-nudibranch 

 

[Grumpyfish]

If they're red planaria flatworms (I can't tell from the pic), you can use Flatworm Exit like Marc says (see Chris' link) or just wait them out like I did. The owner of the LFS I used to go to told me they usually run their course and then fade away, and he was right. My tank was covered with them, and now I have to look hard to find one. Of course, maybe I just got lucky.

 

[jack_tx]

Thanks for your help..