Something on coral is this normal??

[Lololo]

When I first got this piece had that very small the whole coral seems to be doing fine but it has that there doesn’t look like it’s part of it if someone knows thanks

 

[Scorpius]

A spot died on your coral exposing the skeleton and algae decided to grow there.

 

[Lololo]

A spot died on your coral exposing the skeleton and algae decided to grow there.

Thanks should I cut that area out?

 

[Scorpius]

Thanks should I cut that area out?

I wound pull the algae off to see what's underneath first. Coral grow over old skeleton.