What is this thing?

[pedro2003]

Hello, I know I have a bubble algae issue. Mainly on this rock. Trying to face the problem. What I don't know is that thing that grew on the rock. Seems like a small Paly, but i don't have any green zoanthus or Palys that could have originated this. Any thougths?

 

[bluemon]

Yea seems like a paly.

They are common hitchhikers