Baby Polyps?

[NavyNano212]

Hello, these little guys have been growing for a few months but have doubled in size the last 4 weeks. They are still pretty small as the picture has been blown up considerably.
Any thoughts on what type of polyps I have? I have yellow polyps in my tank, some zoos, a chili coral, leather corals and frogspawns. Could this be more yellow polyps?

 

[DevIouS]

If the stems are a little hard.....those are Hydroids dude.

 

[NavyNano212]

Hydroids? Good? Bad? Indifferent? Where did they come from...my LR? I've had it for years, should most of the hidden creatures have come out already?

Thanks

 

[hijinks]

they can spread pretty quickly if they are hydroids to become a forest.. My emerald crabs ate all mine when my tank first started

 

[MatthewScars]

kalk them asap

I have some in my tank, i have to kalk them every month to control the growth.