SUMMARY Cellulase enzymes are enzymes that have many benefits both in vitro and in vivo. In vitro, this enzyme is used as a biocatalyst for certain reactions in industry, while in vivo it can be used to convert cellulose waste into products of economic value. In thisstudy, 16 isolates were selected from 47 endophytic bacterial isolates from the mangrove roots of Bruguiera sp, which are a colle…