ID help?

[WhitePanther93]

Unfortunately I am unable to provide a picture that would be useful here but I was looking at my rockwork and noticed these little white… strands maybe?they're about an 8th of an inch long and have tiny hairs coming off the sides of them. And they’re not pineapple sponges. (I’ve already had that one ID-ed for me).

 

[WhitePanther93]

Okay for some reason video on my phone is infinitely closer up than a pic

 

[sixty_reefer]

Digitate hydroids

 

[WhitePanther93]

Digitate hydroids

Harmful?

 

[sixty_reefer]

Harmful?

It’s debatable, some people say they sting corals others don’t. If you ever want to try and remove them, I would suggest a banded shrimp they are very good at eating a similar species.

 

[muzikalmatt]

Harmful?

They're typically only harmful if the population gets out of control. If you're worried you can remove them manually or smother them with epoxy. There are also some species of fish and inverts that are said to eat them.

 

[vetteguy53081]

Can you retake under white light and for at least 20 seconds ?
Looks to me like poriferan sponge or tube worms.