ID please

[reefkeeper1]

Just noticed that this is growing on the plug of my leather I got a couple of weeks ago
Anybody have any ideas

 

[reefkeeper1]

Just noticed that this is growing on the plug of my leather I got a couple of weeks ago
Anybody have any ideas

 

[Soren]

That looks like colonial hydroids.
See item #9 on Guide to Common Hitchhikers in Reef Tanks

 

[EeyoreIsMySpiritAnimal]

Ah, geez! Take that out of your tank and burn it!

I'm serious - you DO NOT want those to take over your tank. You will Never get rid of them!

And whoever sold you the frag needs to be punched in the face.