The inventory of macroinvertebrates was studied from samples carried out at 15 stations distributed over the longitudinal profile of the river. Sampling was conducted monthly between June 2015 and May 2016. The macrofauna surveyed consisted of 39,718 macroinvertebrates individuals belonging to 91 taxa (genera and species), 42 families, 13 orders and 7 classes. The community is largely dominated by Insects which have contained 82.41% of the total richness of the macrofauna collected. The molluscs were composed of 12.08% of the total richness. Annelids and crustaceans were the poorest groups in the population. The Coleoptera represented the most abundant order in individuals number and the Thiaridae constituted the most abundant family. The study showed a seasonal variation in the abundance of taxa where stations were most abundant in individuals number during the rainy season with high density.
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