Some growth on glass

[schaNYC]

What is this? Looks like some long hair algae growth but also has tiny reddish bugs around it. Not fuzzy like green hair algae but more finer strands.

 

[DallasNYC]

Looks like Hair Algae.

Can't really tell from your picture, but there's actually a pest referred to as 'Red bugs'....

https://www.google.com/?gws_rd=ssl#q=red+bugs+site:www.manhattanreefs.com

 

[reefman]

its "bryopsis" - algea from hell!

 

[dnov99]

Doesn't look like bryopsis to me, as that's is more feathery. I have seen this before and any type of zebrasoma tang will eat it quickly. If you can't place a tang just try manual removal...