ID help please!!

[Dsumpter]

Saw these super tiny green polyps in this crevice on thus rock and not sure what they are. The rock has been in my system since the beginning about 2 years and just appeared out of nowhere about a week or so ago. They kind of resemble aptasia a little bit, but I have never seen bright green ones like this. I have a rather large colony of GSP at the other end of the tank that I have to continually trim back away from the overflow, could it be the beginning of a new gsp colony?

 

[Tuan’s Reef]

Hydroids

 

[bnord]

as above

 

[Dsumpter]

What the heck is a "Hydroid"?

 

[Tuan’s Reef]

What the heck is a "Hydroid"?

Hydroids are colonies of tiny stinging jellies, best described as hundreds of inverted jellyfish attached to a feather- or seaweed-like base, known as the organism's polyp phase.

Phylum Cnidaria, Hydroids

 

[Reefer Matt]

If they are like mine, it is not the end of the world. I have a bunch in one of my tanks. The coral don't seem to mind them.

 

[bnord]

they are just that, a sessile stage of what will end as a tiny pulsing medusa, and then like be gone. not usually a pest in the long term

 

[Dsumpter]

So then should I just leave them alone and see what happens, or should I try to eradicate? I really kind if like their color, even if they are super tiny.

 

[Tuan’s Reef]

So then should I just leave them alone and see what happens, or should I try to eradicate? I really kind if like their color, even if they are super tiny.

yep, do nothing and they'll go away on their own. There are instances were they do not subside.....that would be an issue.