What is this? (coral identification)

[Zzippper]

This coral came attached to some live rock I bought. I've had it for a few months now. Not sure what it is - but it seems happy.



Anyone know what this is?


Z

[Funkmotor]

What does it look like when the lights have been off for a while?  I'd almost say it looks like some sort of leather...

[xiaan]

It looks like brown star polyps. http://www.aquahobby.com/corals/e_clavularia_brown.php

[redbelly]

That is an encrusting Gorgonia.

[Achilles]

Second the encrusting Gorg,
PS this stuff given the right conditions is evil and can take over your tank.