A new species of caesionid fish, Pterocaesio monikae, is described on the basis of 21 specimens, 51.8-97.5 mm SL, collected at Cenderawasih Bay, Papua and Papua Barat
provinces, Indonesia during February 2006 and October 2007. It was observed in large schools containing up to several hundred individuals along the upper edge of seaward
reef slopes at depths ranging from the surface to 55 m.