Did this eat my Zoa's?

[MaxxuM]

I found it on top of a zoa and I got it out immediately. A day later I found another one and took it out as well. So far I haven't found another one and I've been looking every night at random times. About fifteen zoa's have dissapeared. Some shrinking away, some melting, while others just simply diapered overnight. Since removing the starfish no other zoa's have died. I've had a thousand astrea sea star's in my tank and they've never been an issue. This one does not look like a typical astrea though. Did I boot an innocent starfish or was it a killer?

 

[najer]

It is an asterina and in my experience white ones are generally safe but the darker ones tend to be the ones that eat corals.

 

[MaxxuM]

It is an asterina and in my experience white ones are generally safe but the darker ones tend to be the ones that eat corals.

Thank you for the response. I’m looking at this tank as my QT for the 45 so the more issues taken care of now are ones I’ll avoid later. Hopefully I got them all!