Giving the rGH hormone, thyroxine hormone (T4) and its combination through the immersion method in NaCl 0,9 %. The research was done on January - March 2020 at Fish Hatchery and Breeding Laboratory, Aquaculture major, Faculty of Fisheries and Marine Science, Riau University. This research aims to determine the effect of giving rGH hormone, thyroxine hormone (T4) and their combinations, to …