Strange growth on coral.

[Plunder]

I have this strange light brownish looking appendage coming out of the tip of my coral. All of the green centers are always slightly indented down, but this one is slightly indented up. Here is a picture of it, please help!

Thanks

 

[ndrwater]

Looks like it's pooing.. like literally.

 

[Plunder]

Looks like it's pooing.. like literally.

And to think I sat there and stared at it...