Xanthichthys mento, the redtail triggerfish, blue-throat triggerfish, or crosshatch triggerfish, is a species of triggerfish from the Pacific. It inhabits outer-reef areas at depths of 6–131 m (20–430 ft), and feeds on zooplankton. Xanthichthys mento grows to a size of 29 cm (11 in) in length and occasionally makes its way into the aquarium trade.

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