This descriptive study aims to determine intrapopulation variations and relation the phenetic kinship of climbing perches (Anabas testudineus Bloch.) in the waters of South Sumatra and Jambi. The study was conducted from November 2021 to April 2022, with sample collection locations in the Belida River and Kelekar River (South Sumatra), the Kiaro River and Lubuk Belango River (Jambi). The fish a…