Polyp growth on rocks

[runway1]

What are these? TIA!

 

[Fluff]

Your pic didn't show up. ??

 

[runway1]

Well, I tried again and they're there but, how do i post so that they become clickable and enlarge? Thanks.

 

[runway1]

Anyhow, they're a polyp with a green center and long hair around the edge.

 

[Fluff]

It's hard to see without being able to blow it up and unfortunately, I can't help with that. Green center with long tenticles... :? Is this a hitchhiker? Does it look something like this?

 

[runway1]

Yes, it does. What's that you have?

 

[Fluff]

It's a majano anemone. A pest anemone much like aptasia. They spread pretty quickly and should be treated like aptasia. Get some Joe's Juice.