Black Bubble?

[Irsug1]

Anyone know what this is? It's firm to the touch..
View attachment 8279

 

[Darienreefs7]

Bubble algae

 

[madjoe]

Dont pop take out gently that shiet spreads quick

 

[Irsug1]

Thanks, I thought that was what it was but thought they were not firm to touch. I removed it and tried to cut the section of rock it was on and it popped. Giving it a dip in coral revive in hopes that it will kill any free spores.

 

[William Lutman]

take the rock out and do it over a sink

 

[BillyD]

Bubble algae. Carefully take it out