sorry to hi-jack
i have the same problem, but you got way better pics than i could
they were all gone when i had a CB but after it passed it came right back so now i have a bi-color (angel) and he has not done the same awesome job of keeping them trimed, and my tank is infested and even got into every nook and crany of skimmer and was messing with the function of the skimmer. so has been removed. now i have a redicoulous number of them on my rock, and what looks like calcium deposits/white spots on my tank glass. should i scrape them off?