So this is what came of a new piece of live rock my girl picked out because it had a lot of purple colors on it lol. Im trying to figure out what it is,it started smaller and more sparse and has now gotten a lot bigger and thicker. We think its pretty cool hopefully it is not something harmful to the tank.

Sorry for the pic quality she has the phone with her at work had to use my phone.

IMAG0100 - Coral?