What is this?

[reefteaser]

Bought this at a frag swap about 6 years ago when it was the size of a golf ball. Now it’s soft ball size, but we don’t think it’s an acan colony as we were told.
So, what is it?

 

[Sleeping Giant]

Bought this at a frag swap about 6 years ago when it was the size of a golf ball. Now it’s soft ball size, but we don’t think it’s an acan colony as we were told.
So, what is it?

looks like a morphed scan, looks great to by the way

 

[officialreefbros]

I got no clue but it looks awesome!