ABSTRACT This research was conducted from May to June 2022 for 40 days, at Fish Hatchery and Breeding Laboratory, Faculty of Fisheries and Marine, Riau University, Pekanbaru.The aim of this research is to know the differences in the timing of natural feed changes on the growth and survival of Siam catfish larvae (Pangasianodon hypophthalmus). The method used in this study was an experimental m…