Another one of a kind center piece sponge combo with a Orange yellow encrusting sponge growth form and a Black Tunicate coral.
The surprise is that the Tunicate coral is not growing attached or rooted to the live rock base.
It is held there by a good sized decorator crab that is clinging to the structure.
So it may be walking around in the shipping container when yo receive it or the crab may move to another place in your tank.
So you have a midnight black tunicate coral about 3 inches in diameter that is growing on a crab and is movable.
I accidentally knocked the crab off in handling this live rock and it found it's way in our large tank all the way back to it's original home and attached itself back to where it was originally as you see in the pics.