

I bought a 180gal tank complete with LR & coral, got it moved and the rock had to sit in buckets for 7 days. After putting the rock in the tank I start cleaning out the buckets and this comes rolling out as I dump the dirty water. So having no other place to put it I drop it in the tank. It's been like this for 3 days now.
Any idea what it is?
Thanks,
Jim

Pretty one though.

