So I am new to saltwater tanks and I recently set up my first tank (half a week ago). For the tank I bought a live rock from a local fish store and I put it in the tank to cycle. I did not notice this before but this morning when I checked on it I found what looks to be a small coral. I don’t know if it is still alive since when transporting the rock to my house is was out of the water in a tied plastic bag for 30+ minutes. Does anyone know what kind of coral it is, if it’s still alive, and what I should do about it? There is also nothing else alive in the tank.