Bounce Bubble on my Chalice?

[MikeCizzle]

I was clearing out some invasive nuisance Pocillopora and freed this beauty. I realized that it has this bubble that looks like a bounce Mushroom bubble. I ran a quick Google search and only found a handful of cases. This looks be rare. All I can say is that I've had this Chalice for at least 3 years and it didn't look like this when I bought it. Not even the color is the same. I cannot say when this bubble developed or how long it's been that way. Because

it was surrounded by the nuisance coral which blocked it from view.

Short video here:

 

[grisha]

I’m actually trying to figure out the same thing. This bubble on my chalice must be chickpea size. I’m thinking “”It’s not a tumaa “

 

[MikeCizzle]

I’m actually trying to figure out the same thing. This bubble on my chalice must be chickpea size. I’m thinking “”It’s not a tumaa “

Wow, that's a beauty!

 

[grisha]

Thank you man, I was about to mention yours are really hot as well