6 Large Ranchus and 2 Lionheads. The biggest one is NumNums (8 inches head to tail) - I've had him for a year. The rest are about 5 and 6 inches long. The smallest goldfish is about 3.5". Total water circulation is 110 gallons (tank is a 75g connected to a 35g water sump) with 2 HOB filters rated at 500gph each. 80% Water changes EVERY weekend. They are fed New Life Spectrum Sinking Pellets.