One spot of coralline algae dead?

[Mattc123]

This is a picture of what I'm pretty confident is coralline on the back wall of my tank the other day. Today it looks like it's a smaller patch and the color is much less vibrant. Did I lose my first chance at getting coralline algae in my tank?

 

[ScottR]

That’s going to be really hard to tell from a pic. I’m sure coralline can die... but does it?

 

[rkpetersen]

Looks like coralline to me. And its growth might have been aborted for whatever reason.
But if you had one spot of coralline, it'll only be a short time before you see more.

 

[Katrina71]

Do you have little asterina starfish? If yes, it has probably been a yummy snack