Digitate Hydroids or Harmless?

[GoodKat]

So I just found out (thanks to the help of some people here) that I have some colonial hydroids in my tank. I did some research and I think I can win the fight against them. But then.... I noticed these (see picture). Any idea what these are? Are they more pest hydroids?

I am very concerned and think I may just start removing the rock. It sucks because I have good sponge growth and coralline algae on them...

 

[reef lover]

Not digitate but definitely a hydroid.

 

[KJ]

Branching hydroids.

 

[Gareth elliott]

https://www.reef2reef.com/threads/here-it-is-fenbendazole-use-against-hydroids.214950/

Thread to read through.

Peppermint shrimp also sometimes eat hydroids.

Increased mechanical filtration can also limit their growth and reproduction by limiting their food source.

 

[GoodKat]

Branching hydroids.

@KJ thanks for the ID. Do you know where I can get more info on them? I found another thread Searching branching hyroids doesn't return much.

Mainly, are they harmful to corals and fish. I know most or all hyroids sting to varying degrees.

 

[KJ]

@KJ thanks for the ID.

YW.
It is hard to find good info on how to battle hydroids on the web,I can just give you a link from a member of this forum but I have had no personal experience so far with this yet.I hope it doesn`t happen.
https://www.reef2reef.com/threads/here-it-is-fenbendazole-use-against-hydroids.214950/

 

[KJ]

I know there are a few nudibranchs that only feed on hydroids, but it is like looking for a needle in a haystack.