yea, and there are plenty of people who think they can keep sharks in a 125 gallon. even if people do it, it's not good for the fish. think of the size of the tank, and then think of the ocean. i go snorkeling alot and here is something i've noticed. tangs and the larger fish travel ALOT. they never stay within a 46 gallon area. that is why they need at least 75 gallons or more. clowns and gobies and such, on the other hand are territorial, and stay in their domain. for their size, a 46 gallon tank will suit them. just think about how you always see the tang swimming back and forth. then how you see gobies just sitting or clowns swimming in place. just use common judgement, and if you don't have that take our advice, don't get a tang. honestly, my parents want a tang for my tank, and i let them think they were getting one, but eventually i had to tell them there is no way i am putting one in my tank.