Loving our new (to us) 85 gal tank w/ sump and G4 Radions. But noticed something new! Growing on the underneath side of rock????
Looks like a Ball Anemone. Not anywhere as invasive as aiptasia or majano. They are actually not anemones but are related to mushrooms like ricordia. Most people leave them but you can get rid of it with aiptasia X or lemon juice if you don't like it. I had one on my live rock years ago and left him alone.