Ok all, the fish have been together in the big tank for a week now. I check on them periodically and there is little movement in the tank. Jack hangs out in his tube and vinny in his plant on the other side of the tank. Vinny will venture over to jacks side of the tank occasionally, and when he does, he is usually greated by jack. Jack will come out of his tube and him and vinny will hang out behind it near a piece of slate, leaned against the tube on one side and the gravel on the other to create a hideout underneath, while keeping a flat surface on top. Jack will hang out on top and vinny below, which is closer to jacks tube. Eventually, the both of them will head into jacks tube and hang out in there. I have seen vinny in that tube with jack quite often and usually for long periods of time. Obviously, jack has claimed the tube as his territory, he doesn't make it to the other side of the tank very often, but he keeps letting the smaller vinny into it, with no penalty. I understand jds aren't the most aggressive fish in the tank, but he should protect his territory. Has vinny pulled rank and and become a brute, he show no sign of aggression either. For a little bit last night all three, the pleco, jack, and vinny were hanging out in the tube, the pleco eating of course. They still do their dance and never have I seen a real aggressive move from either. The other day, jack actually had vinny's head in his mouth, his entire head!!!! He didn't bite, no scrape or cut on vinny, vinny didn't even swim away fast or turn on his side defensively, he just sat there and go closer to jack. Not sure what it is all about, pretty cool stuff though, IMO.