I had mine for 3 and a half years his name was Jerome, he was one of my favorite fish even though they are poisonous they are extremely docile, they are not as active or large as most tangs, they are very skittish and for the first few weeks in my tank he would hide in the rock work every time i came into the room. As i said before they are not as large as many tangs but they are very thick. They grow relatively slowly and mine had only grown 3.5 inches from the size i bought him when he died. They are great additions to your tank with the only bad parts being there skittishness, venom and, i don't know if this has happened to anybody else, but the fact that a lot of guests that see my tank think he is a deformed version of my yellow tang.