This study was conducted from December 2023 to January 2024, at UPTD Balai Perikanan Budidaya Laut dan Payau (BPBALP) Teluk Buo. The purpose of this study was to analyze the effect of a combination of salinity and Walne fertilizer on the population growth of Nannochloropsis sp. on laboratory scale. The method used in this study is an experimental method using CRD (Completely Randomized Design) …