Mushroom coral or Bubble Tip... or something else?

[Atoll on me]

Below are a few pictures with red circles around the item in question. It sure looks like a bubble tip to me in the picture where its reaching up, but Im uncertain.

 

[rusty shackleford yes]

Looks like a mushroom to me! I’m not certain though

 

[Aquadude1]

Looks like a ricordia florida to me.

 

[Gumbies R Us]

Photos under white lights? I'm leaning towards a mushroom!

 

[Michael Hughes]

I agree with mushroom.

 

[Atoll on me]

Thank you all!