Live Rock hitchhiker ID help

[TD43]

Can anyone identify these for me, do I need to remove them. They came with the live rock I just bought. Thanks.

 

[username in use]

Almost looks like a pipe organ coral.

 

[Sugar Magnolia]

Yeah, that's coral polyps. No worries.

 

[TD43]

You all are the best, thanks.

 

[heathlindner25]

Almost looks like a pipe organ coral.

or Xenia, 1 grows a lot faster than the other....