Theres around 30 different species of Siganus. ( Rabbitfish )
Depending on which writers you favor there is one genus (Siganus) and two sub-genera, or elevating those two, two genera (Siganus and Lo); the former with 22 species, the latter with five. All have a, well... typical "rabbit-face" appearance and body plan. Lagomorph similarities include small, apical hare-like mouths, large, dark eyes and reserved temperament.
Fishbase will reconize/show either.
The S. vulpinus and the S. unimaculatus. The latter being the Onespot.