Numerous black spots on body in small juveniles. May have dark-edged pale blue spots on larger juveniles. Juveniles look similar to that of the Immaculate boxfish, which is differentiable by having additional pale blue spots on the body not observed on the Yellow boxfish.
Adult males:
Body bluish with yellow undertones.
Yellow seams between body plates.
While similar looking, the Immaculate boxfish has blue spots on each plate.
