hydroids or feather duster ? please help !!!!

[Coral Hoarder]

hi all have thies things on a rock and want o know what they are i think there hydroids but im not 100% is there any thing that eats them
? will they go away ? heres some pics
dont know if u can see the piucs but there hard to take pics of il do a vid later please help

[asylumdown]

that just looks like a rock with a light covering of brown algae to me, maybe diatoms or dinos. Can you be more specific as to where you see the organism you want ID on?

[asylumdown]

I should add that the nasty kind of hydroids are very distinctive looking. Even a single individual should be obvious to the naked eye without much ambiguity. Google images of "brown hydroids" and see if it matches. They look like brown, teeny weeny truffula trees from the Lorax

[Coral Hoarder]

got a better pic just used the app to make the red line where they are growing please excuse the format lol

[asylumdown]

oh yah, those look like the same kind of tiny clear hydroids that show up on your glass sometimes.

I've never heard of those becoming a problem, and the ones that show up on glass usually wax and wane according to some set of conditions that nobody really understands.

Though I could still be wrong. They could be baby aiptasia (and that would be a real bummer), but I doubt it.

Anyway, save someone else jumping in and saying I'm out to lunch I personally wouldn't be too worried about those guys. It's the brown colonial digitate hydroids that are a real nuisance.

[Coral Hoarder]

Thanks there not on. Any of the corals just rock I can see them in there. Planktonick stage festering in my fuge lol the tank is kinda cold could be that