What is this black pearl thingy?

2008pollyanna

Reefing newb
What is this cute black pearl or marble thing? Is it safe, it has grown like double in the last month.
Ok, I need the knowledge stirs....thankyou
 

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that looks like bubble alage take it off the rock but do not break it open it is best if you take the rock out of the tank to do that. try using tweezers.
 
I tried to zoom in on it but it would get too blurry, Can you take a closer pic? Not sure if it's algae because it's black. Is it hard or soft?
 
It is black and it is hard and shiny. But if you push on it real hard it does seem to give just abit. I will take another pic and resend....
Thankyou
 
New pics...
Black hard somwhat hard waxy shiny surface.
 

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I have one of those on my rock to ... about the same size ... i have no clue as to what it is but sure would like to know
 
Definitely bubble algae. I've had black and silver ones in my tank too.

I'd get rid of it before it starts to spread even more. Don't pop it in your tank, or it will release spores. They're pretty easy to remove by hand with a pair of tweezers.
 
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