Moeyingyi reservoir (constructed in 1878) is situated in the Bago Region, south eastern part of Myanmar. The area was established as Moeyingyi Wetland Wildlife Sanctuary in 1988, and in 2004 it was designated as the first Ramsar site of Myanmar.

The aim of the present study was to give important and improved knowledge about aquatic biodiversity in the Moeyingyi Reservoir in Myanmar. The survey took place in November 2015 and included physical measurements, water chemistry, phytoplankton, and aquatic macrophytes. Moeyingyi is a very shallow and turbid lake, with low conductivity and varying nutrient conditions.