Had this on my live rock for months , it was only one head , since I upgraddd the lighting , it has been growing and multiplying pretty quickly . I don't think anemone but I can't be sure .
After about 6 months, a couple of my clowns are starting to host one of my anenomes. I have a rose bubble tip and a condylactis; I thought it was odd that they started hosting the condy and not the rbta, so I thought I should share. https://goo.gl/photos/81QSaugGVfuhVzbh7