Hydroids, worm?

[Crazeh]

What are these on my LR? Have been there since I started up about 10 month ago but population slowly building (but staying isolated to that corner of that rock).

Originally thought it was Aiptasia, but Aiptasia X treatment had absolutely no impact.

Maybe a type of hydroid or worm? They retract into the tube portion when disturbed.

As per the blue photo they also fluoresce under blues.

 

[DSC reef]

They look like hydroids to me

 

[reef lover]

Yup...

 

[Lovemyreef2015]

Yes they are Hydroids. I manually removed the ones we had. They peel up kind of like velcro. But if you can just remove the rock that would be better

 

[Crazeh]

Thanks everyone. I will have a go at manual removal or failing that cover with putty.

Fortunately the nearest coral is a few inches away - I've read hydroids can sting.