Nice pics guys!
Mike, that top-down shot makes it look like a baby rhizo
I believe that once
Balanophyllia are in good health and are fed well they have enough energy to asexually "bud" babies, as do rhizos. I have had one rhizo in my care for two years that has done this, and I've seen several fresh imports come in with tiny baby "buds" on the like the pic Mike posted in another thread here in this forum. I think the balanos just have a much faster growth rate, therefore allowing them to have a colonial
appearance over time; Then again maybe there are colonial species of
Balanophyllia...