Freshwater shrimp, also called Malaysian prawn, are the species Macrobrachium rosenbergii, originally from Malaysia. These are relatively easy to aquaculture, but require large ponds with excellent filtration and water quality. Many shrimp farms have successfully employed a three-pond grow-out system, allowing for three harvests a year. Unlike its saltwater counterparts, it is unnecessary to be concerned with salinity. However, many of the water-quality issues are the same. Raising freshwater shrimp in tanks has generally been unsuccessful, as these animals need well-oxygenated water and plenty of space to thrive.