Abstract This research was conducted from April to Mei 2019 an the Hatchery and fish breeding Laboratory, Faculty of Fisheries and Marine, Riau University. The aims of this research was to know the effect of hCG (Human Chorionic Gonadotropin) pituitary gland injected with different dose on ovulation and survivaln rate of Siban (Cyclocheilithys apogon) and To find the best dose ot the pitui…