I noticed a couple days ago that there is a little florescent spot on one of my rocks and today it looks like its starting to spread.Is there such thing as florescent orange coraline?or is it something else?

Well im no expert but I know there are hundreds of species of coraline so it very well could be. Sounds really cool too, I wouldnt worry about it just enjoy it.

Probably. I've sometimes found patches of glowing coralline. They don't seem to last long.

+1

could be coralline, could be anything - I have a bright red sponge that takes on a completely flat, encrusting form in places.

I'm pretty sure that i heard that glowing/florescent coraline is dying, would lakshwadeep's spots would not last very long

Yes there is glowing orange coralline it is pretty rare and like other posters said it usually doesn't last long or gets taken over by green,purple,pink.

Yes, I forgot that some of the glowing coralline I've seen had been exposed to air (they were on a powerhead), and likely were dying.

it's dying coralline. i get patches of it after every wc. looks cool though.

I've seen an encrusting coralline(well, after seeing what jeremai said I'm not so sure) that starts out fluorescent orange and darkens to red as it grows. You'll see the glowing orange around the edges if it's growing outwards.

There is a disease of coralline algae that starts as fluorescent orange spots, and gradually spreads and kills the coralline (leaving white patches behind).

And then there's the fluorescent corraline that is in low light conditions and when you see it you move the rock to a better viewing area and the light kills it. That's been my experience.