This research was conducted in April 2012 in Jangkang coastal waters of Bengkalis Regency, Riau Province. Three station were decided on the Jangkang Coastal by belt transect method. The results should that there were 10 species of mangrove found in the study area, namely: Bruguiera gymnorhyza, Bruguiera parviflora, Nypa fruticans, Rhyzophora apiculata, Rhyzophora mucronata, Sonneratia alba, Son…