What ate my zoos?

[builderguy]

okay...here's the deal.

I epoxied a rock containing 30 - 40 bright orange zoanthids to a piece of my live rock on Saturday. All looked well through the weekend and last night when I got home from work.

This morning the rock was no longer attached (could have fallen but may have been ripped off) to the live rock. It was lying face down in the sand.

When I turned it over almost all but a few of the zoanthids were gone!

What could have eaten that many in one night?

I have a 2.5 to 3" unidentifiable crab in the tank that I found when I broke everything down...I left him in and now I'm wondering if it was him. I looked for nudi's and sundial snails and couldn't find anything.

Any ideas? I'll have to take all the rock out to find the little b*stard.

 

[smp]

Nudis and sundial snails wouldn't have made such fast work of those zoos. I've never heard of any disappearing that fast, but that crab sounds big ... I say get rid of it or put it in quarantine and see if it continues.

 

[builderguy]

okay...looks like I have to tear the tank apart and find that crab.