the 120 yes is gallons and its the smaller tank with the fish not the sharks in it,its 4x2x2 its what i started all of my sharks in when they were babies now their in a 500 gallon and next is their pool addition on the back of my house,i love these guys just wish they would tell you exactly what your in for when you buy them because at 30 inches they are getting hard to get rid of,i mean whos got a tank big enough to take em on and even if they did with something that big its not just sitting around they usually got something in it and adding a shark sometimes isnt the best idea,ill tell ya what the only thing i dont like about the sharks is the food bill lol