Hitchhiker Coral?

[Zalzo]

Hi, I was wondering if anyone knew what these were. I think they're some kind of zoa. They came on liverock and spread over the last 7 years. They've always been very brown, but since changing out my fluval strip led for 2 ai prime 16s a couple weeks ago theyve been getting more and more green

 

[Auquanut]

Looks like some kind of paly. Some of these guys can be pretty invasive.

 

[kingoftheHiLLpeople]

Paly

 

[Sump Crab]

Be sure to research palytoxin

 

[ying yang]

Maybe some call them texas trash palys ?
Look similar anyway or green implosions