Could this be my problem?

[dphins]

I have been having problems with my tank for a while now. My sps corals have been receeding from the bottom up. The only thing that doesn't measure right is my magnesium. It is 1200 which isn't terrible. I have done water changes and run lots of carbon but it hasn't stopped. Today, I pulled 2 different corals looking for acro eating flatworms and I find this. Could this be the problem? I found one on each coral I took out.

 

[mcox33]

what is it a starfish of some sort can't really see enough detail to be sure

 

[dphins]

Yes it is a five legged starfish. This is as close I can get with my camera, sorry.

 

[trueblackpercula]

hope this helps you out.

 

[clkwrk]

thats ugly.

 

[shelburn61]

Great... one more pest to worry about?

 

[Wiskey]

Is that an asterina star? I have the good kind, but I hear that there is another kind that eat coral, although it is not commenly found in the hobby.

Here we go, about half way down has a smal blurb on them
http://www.xtalworld.com/Aquarium/hitchfaq.htm

HTH,
Whiskey