 Once back at the farm sites, the tuna are transferred from the tow pontoons into diameter farm pontoons.They are then fed bait fish (usually a range of locally caught or imported small pelagic species such as sardines) six days per week, twice per day and "grown out" for three to eight months, reaching an average of .Because SBT swim so fast and are used to migrating long distances, they are difficult to keep in small pens.