I currently have 7 of the threadfins, I started out with 8 of them and one vanished in the first few days but the others have been together for about a year and a half now. They are out all the time mostly in the upper half of the water column and scattered around the tank sometimes in small groups, early morn and in the eve when the MHs go out they are in a tight school sometimes they chase of of the larger ones out but he doesnt go far from the group. At night they are all over the tank swimming around, if I am watching TV late night I will look at the tank and the light from the TV lights it up enough that I can see what is going on and they seem to be playing and chasing each other, they are defiantly more active at night.
I was going to add a group of the orange line but I think I am going to either add a group of chromis or more anthias as well as a few more threadfins
Your welcome to come by and check them out anytime you are in the area if you want to see them in person. Also if you let me know when you order I would be interested in some to cut down shipping if you dont get them local, or even if we order a bunch to get a better deal on them.