I had one for 4 years, very personable, active, will eat from your hand, and in my case was peaceful to everyone in the tank, also mine grew big, very fast lol, I bought him small 3 inch or so, my ex got my tank and all my corals and fish, (which def sux) but she tells me he is still going strong and that would make him 9 years old lol. well, slightly off topic but , yes, very good, fun fish and hardy. def agree a 125 is to small tho, ive had tangs pretty much since one could buy them and in my opinion the bigger the tank the better. they love to swim constantly. well ive rambled enough lol hope ive helped a lil.