Xanthichthys caeruleolineatus, the Goldenback triggerfish or the Outrigger triggerfish is a species of triggerfish from the Indo-West Pacific. It occasionally makes its way into the aquarium trade. It grows to a size of 37 cm (15 in) in length.
Xanthichthys caeruleolineatus is one of the rarest Triggerfish in the trade, and also ranks high on the list for some of the biggest Triggers. The Triggerfish gets its name from its beautiful golden back.