Help! ID

[Exotic_Reefer0]

My friend has been having issues with his tank for the past 2 weeks and his corals were gradually getting worse. He was scared about losing them and asked if he could bring them over. As I started looking at them I noticed they're all covered in these little white things. Any input?

NOTE: I did not put his corals in my tank after seeing this. I told him I'd post it on r2r to see what you guys say

 

[Cell]

Spirorbid worms. Harmless, but can be scraped off pretty easily.