Channa lucius is a type of freshwater fish that commonly inhabit the Kampar Lama Oxbow Lake. This study aims to understand the reproductive biology of C. lucius. The fish was sampled 4 times, twice/month, from June-July 2019. Parameters measured were sexsual characteristics, sex ratio, gonad maturity level, gonad somatic indeks (GSI), fecundity and egg diameter. Results shown that there were 36…