New live rock, Something is growing!!

I started my aquarium just 2 days ago. I bought these live rocks right out of of someones healthy aquarium. They sat around for about 12 hours before I was able to finally get them in the tank.

They had something on them, I have no idea what it is... because im a noob
I figured it was coral but though it was dead.




I came home after work today. My tank as completely cleared up.
Some of those white thinks look like there opening up and now look like this






Any idea what this is? If its coral, does anyone know its name or what it'll look like if it continues to grow or is that all I should expect to see?

TIA!

 

they are little feather dusters - not corals but a nice filter feeder and they're pretty to look at.

 

Look like pest anemones or coral to me

 

Image #1 looks like either palys or zonathids that have been without adequate lighting for some time, not unusual on live rock.

Image #2 and 3 not sure on. They are both in the shadows or shaded. Need to give it some more time to make a correct ID IMO.

 

Oh man, you just took me back to the days when I set up my first saltwater tank back in 07. It was so fun looking at the live rock and being like, "what's that?...what's that?...!! WHAT'S THAT?!?!"

To me, they look to be either zoanthids, some kind of anemone or a dark coral kinda like in the family of sun coral....I doubt dark coral...hmm

 

The "things" in image 2 and 3 are the same as image one. "They just opened up" where as the rest haven't changed. They looked identical when I first put them in the tank.

LOL That's exactly what happen to. I started yelling and calling my wife to come and see. I was excited until I realized she was playing along because she didn't want to hurt my feelings at how much she didn't care haha

 

Hmm probably Palys then although I do not know type, still could be Zoanthids though.

Where did the rock come from as in origin geographically? And seller?

 

Look like bleached zoa/paly or an anemone.

 

I bought them from a private seller who was selling his whole aquarium.
I'm not sure where there from. I didn't ask because I didn't know it matters:/

What does bleached exactly mean? Like actual bleach? Lol if so would they still continue to grow? Should I try feeding them? Better lighting?


Thanks for the help!

 

Bleached means that coral/invert has lost it's zooxanthellae. Since zooxanthellae give the coral it's color, when zooxanthellae is absent some corals/inverts appear white. I have seen this a few times with palys or zoanthids that where in a dark area of the tank.