What's this?

[SycoCell]

What are these little tree things? These are the only ones I have.

 

[Cliving1]

Looks like Zoanthids or Paly's to me

 

[homer1475]

Look like palythoa to me also.

Be careful handling them as some are known to emit a poison which is toxic to humans. Google paly toxin to get an idea what your dealing with.

 

[ericarenee]

Look like palythoa to me also.

Be careful handling them as some are known to emit a poison which is toxic to humans. Google paly toxin to get an idea what your dealing with.

^^^^^^^^for sure ^^^^^

 

[AlSimmons]

Protopalythoas.

http://www.advancedaquarist.com/2003/2/inverts

 

[Nandez13]

They look like the kind of paly that takes over quick and isn't much of an eye catcher.

I recommend isolating them to one rock should you every want to move or get rid of them

 

[SycoCell]

Thanks guys. So, should I leave them? I don't have anything in my tank besides live rock and a small cleanup crew. So far they are isolated to a tiny spot on only one rock.

 

[crawlerman]

You should keep them if you like them. But like Nadez said, they can spread pretty fast. I'd keep that rock out away from any other rocks so they just stay on one rock. I had them take over a lot of rock on my first setup. But I took them to my LFS and got credit for them that I used to buy coral I wanted more.

 

[WatDatThing]

oh no, all my LR have a few of them. Would a few drops of vinegar on that area kill them? My thinking is take it out of the tank, add a few drops to kill them, rise off the rock and then add back to the tank.