[BubbaWPB]

This coral grew spontaneously in my tank on the live rock (the one in the front, not the mushrooms in the back).
I first noticed it about 4 months ago as a small fluorescent speck about a millimeter in diameter. I initially thought
it was some sort of coralline algae. It grew larger, and looked like a little cup. As it has gotten bigger, the
tentacles have become apparent. It's now a little over an inch long and over 3/4 inch wide.

It's beginning to look like some sort of open brain coral... anyone got any clues?

[Reefland]

It's attached to the rock? The common brains and other LPS are usually not attached to liverock. Without that characteristic, perhaps it is a Cynarina sp.?

[BubbaWPB]

I'm assuming it is attached to the rock since it hasn't moved and its "lobes" now move about in the current....

[Reefland]

It could be one of many different things:
Scolymia sp.
Lobophyllia sp.
Cynarina sp.
Perhaps we can get a little closer as it grows.

[zhenya]

Originally Posted by Reefland

It could be one of many different things:
Scolymia sp.
Lobophyllia sp.
Cynarina sp.
Perhaps we can get a little closer as it grows.

If I would to take a guess I'd say it looks like a Lobophyllia, the fact that it is attached to the substrate is simply becouse it is a juvenile. I think all of this corals attached to substrate at first and become detached later on, as they mature and grow. Unless, I mixed everything up again, as usual.

[brooke]

Regardless of what it is, it sure does look cool!

[BubbaWPB]

Thanks, brooke! I think it's cool, too.