The study was conducted on 26-31 May 2018 at BBI Kurnia Indah Mahato Village KM 37 Tambusai Utara Rokan Hulu Regency. The purpose of this study was to determine the best dose of the effect of the combination of ovaprim and oxytocin hormones with different ratios for ovulation and hatching of fish eggs baung. The method used in this study is the experimental method. The treatments applied in thi…