it looks like a small shroom of some sort but hard to tell.
The brown oval thing above the red arrow, just below the red mushroom.
Barry
Black sun corals?
Glad you found a coral you've been looking for! Now have fun keeping them fed
EDIT:
I think they're just dark and/or closed up FROGSPAWN! You have been looking for them for a while! Congrats either way!
BLACK SUN CORAL.............Your correct.
They are kinda hard to find. At least for me.
Barry
Well it's a little late now, but I have Bayer pesticide ordered:hmm3:Yeah bristle and most likely bleached a bit from the dip.
I would suggest switching off of revive though as it does not catch red/black bugs as I have recently experienced. I am making the switch to Bayer pesticide which apparently is the preferred dip these days since it gets those buggers....