They attribute declining catches to illegal electrofishing and a series of nets that divide the Tonle Sap lake – Southeast Asia’s largest and a spawning ground for numerous fish species – from the river that both feeds and drains it. The effects of rampant sand dredging (an industry fueled by domestic and international land-reclamation projects) has yet to be fully studied. A series of proposed and controversial dams along the Mekong’s mainstream in Laos are also expected to significantly impact fish populations. One of these dams, which will be built less than two kilometers north of the Lao-Cambodian border, may prove to be particularly devastating to Cambodia’s fisheries.