Digitate Hydroids

[paulbeau]

Hi, I have some hitch hikers on my live rock! I have identified them as digitate hydroids! Are these good or bad??
Thanks

 

[CrystalAZ]

They can sting a coral if they are next to it. Otherwise, they are neither good or bad. I had some and they just went away on their own but they spread for some people.

Up to you whether you want to go ahead and tweeze it out (they do sting people!) or just keep an eye on it.

Crystal