ABSTRACT This research was conducted on February 16, 2020 - March 27, 2020, at Fish Hatchery and Breeding Laboratory of Fishery and Marine Science Faculty of Riau University. The aim of this research was to determine the effect of Recombinant Growth Hormone (rGH) and the optimal dose and immersion duration on growth and survival rate of river catfish larvae (Hemibagrus nemurus). The metho…