Long tube with "hairs" sticking out all over. They look like several types of hydroids I found in the forum, but seem slightly different. From what I can see, they are covering the rock in areas of high flow and and a few zoa frags. Zoa's are agitated and haven't opened fully in days.
Disregard the spirorbids, they are everywhere.
Disregard the spirorbids, they are everywhere.