The main characteristics of the river A very steep embankment on both sides. Turn flows along the slopes Current to flow from north to south throughout the year. The water level in the wet season and the dry season is very different. Depending on the speed of the current season. Soils are sandy river. There are hundreds of small islands along the river. Large animals are important and are found only in the Mekong giant catfish in Thailand and Laos have beliefs about the serpent .