Snakehead fish (Channa striata) is one of freshwater fish species that inhabit the Sei Paku Reservoir. A study aims to find out the reproductive biology of C. striata has been done in February to April 2019. The fish was sampled 6 times, once/2 weeks. Parameters measured were sex ratio, gonad maturity level, Gonad Somatic Index (GSI), fecundity and egg diameter. Total fish sampled was 97, consi…