Orange Dots on LR

[Matthew Cautero]

I Noticed these Neon Orange Dots on my LR today does anyone know what they are and if they are bad or not

 

[Matthew Cautero]

sorry in advance for the bad picture

 

[pugcrush]

Sponge maybe? That's the first thing that comes to mind if it's orange.

 

[Krzydmnd]

I get a few spots of that occasionally but they only last a few days. My uneducated guess is some kind of coralline algae growth phase.

 

[Maritimer]

If they're bright fluorescent orange, it may be coralline that's been damaged. I see it sometimes if an asterina snacks on a patch of coralline, or if I soak a powerhead in hot water and vinegar for a couple of hours.

~Bruce