I have this Nubby type of coral, two kinds actually (one white, the other brown) They came on my
LR, and I have been unsuccessful in finding out what they are...
The small circular features have small fingers that extend during lighting hours.
The closeup picture is blurry, and I attached a full tank shot you can see it in the top left area of my tank on the top.
The best I can come up with is an "Ivory Coral" which is an Oculina species...
Which looks very close to this picture:
TIA