The biodiversity of the Congo Basin is a resource that must be well known and managed. Despite the strong pressure exerted on it, biodiversity still contains emblematic species that must be preserved. In addition to their biological importance, tropical forests remain essential for the riparian populations. Hence the need for rational and efficient management.We were interested in a seasonal catch assessment of endangered species fish. The results obtained during this research prove the failure to respect the capture of certain species of fish without taking into account the respect of the season (the calendar, the fishing zones as well as the biological maturity).This state of affairs sufficiently proves that the Ministry of Agriculture, Fisheries and Livestock as well as that of the Environment, Nature Conservation and Tourism through the various services do not apply the regulatory measures for conservation of halieutic diversity.