Please ID

[ramabama]

what is this? Good/bad? It moves pretty fast.

 

[ReeferMaddness843]

Looks like asterina starfish. More than likely if you have one, there are more. I'm indifferent to them personally as I've not had a bad experience with them. A lot of people will say pull them as they may eat softies. But again, I've never had the issue. In laymans explanation I've heard as well the lighter ones are ok, but the darker seem to munch zoas and the like. I've got the crisp white ones and never experienced the other so I can't offer first hand knowledge on them. Hope this helps a push to the right direction for whatever action you may chose.

 

[jsker]

I second that on asterina starfish. I have them and they do not bother anything in the tank.

 

[ramabama]

Thanks!!

 

[brett_schn]

I have them and I can see them eating my coralline

 

[Mariners]

Asterina are harmless for the most part but the populations can get out of control. Ive seen pic of tanks where u can barely see thru the glass and u wind up throwing them away by the bunches. Ive been told by another member of r2r that when they dont have enough to eat they turn to zoas.