Hydroid eradication?

[Piraat Pierre]

Hi are these a type of hydroid? They're overgrowing and stinging my corals. How do I get rid of them? I had a filefish for Aiptasia but it ate my Zoas.
I've read the Halloween hermits might help, Emerald crabs, urchins?
Please help!
Peter

 

[Shon]

Google clove polyp. If it isn't that, try taking a pic in whiter light because that's what that photo makes them look like.

 

[EeyoreIsMySpiritAnimal]

Hi are these a type of hydroid? They're overgrowing and stinging my corals. How do I get rid of them? I had a filefish for Aiptasia but it ate my Zoas.
I've read the Halloween hermits might help, Emerald crabs, urchins?
Please help!
Peter

It's very difficult to make out whatever you're asking about...