Definitely my favorite tang and one of my favorite fish all around! Mine are still young (the larger of the two is around 10") and are just starting to develop their "horns". I'm still unsure as to whether I have a M/F pair, but they get along very well and are almost always swimming together. They are active fish, and use every bit of their 10' pool. Fast growers as well! Thought I'd share a couple pictures of mine. The first is from October '14, and the other from March '15. For a size reference, the smaller one (by the nori) was right around 2.5" in the first pic.
Six months later.