Is this Aiptasia?

[hankacrank]

I will explain to you exactly why this is not Aiptasia. For starters, the morphology is all wrong. But more importantly, the first person whom responded "you have a cluster of aiptasia" literally stated an oxymoron. Aiptasia does not reproduce by replicating in adjacent. They release their gametes into the water column and they proceed to grow wherever they land and attach. Soft corals or paly/zoa type species tend to reproduce by foot spread and form clusters. I would be guessing something from that family. But for reference, there is no such thing as "a cluster of aiptasia".