New random polyp on rock - colonial hydroid?

[Dkmoo]

Just noticed little guy popping up on my rocks. Is this colonial? Or a baby stylo taking hold? It looks similar but I didn't know they can spread like that? (You can see the mother branch in the same pic)

 

[MnFish1]

Just noticed little guy popping up on my rocks. Is this colonial? Or a baby stylo taking hold? It looks similar but I didn't know they can spread like that? (You can see the mother branch in the same pic)

I've had this happen from a small piece that I bumped off - I cant tell what it is due to the size. It could be either - I wouldn't worry about it IMHO