Aiptasia or something else?

[Shackleton]

At first I thought this was Aiptasia, but it’s growing so fast and seems more spread out than others I’ve encountered. About to kill it, but want to make sure first. What do you think?

 

[JGT]

Looks like Aiptasia, albeit a large one. I’d nuke em.

 

[USMC4Life]

Yap. Aiptasia, kill it. lol