Think I got a freebie, star polyps maybe???

so I ordered some frags weeks back, was supposed to get a freebie with buying 4, but I got two freebies and found this large chunk of coralline in the bag, so I put it in the tank to spur more coralline growth and its doing great, but it ended up upside down and I left it for a day or so since it doesnt need alot of light, and I notice these small polyps? not sure what they are kinda look like tiny star polyps, they are a white stalk with brown/tan little fingers of them, maybe 6 or so, defiantly acts like a soft coral. closes when distured, opens back up so I moved them up to a more well lighted spot...and left it flipped to they are up, I have probably 10 or so on the coralline...heres a pic of the chunck they are on, you can see the dots(couldnt get a good close up of them though)...anyone heard of something like this...

 

Looks like anthelia. Grows as a pinkish mat usually. Can easily take over a tank.

 

that may be it, still too small to see for sure...if so should I let it grow and just keep tabs on it, if I like the looks of it...