The research was conducted from August to October 2019 in the Laboratory of Fish Hatchery and Breeding (PPI), Faculty of Fisheries and Marine Science, University of Riau. The purpose of this research was to know the effect of hCG combination with ovaprim to ovulation and egg hatchability of Signal barb (Labeobarbus festivus, Heckel 1843) and to know of hCG with ovaprim best treatment to stimula…