Macrobrachium is a genus of freshwater prawns or shrimps characterised by the extreme enlargement of the second pair of pereiopods, at least in the male. It contains the following species: \n* Macrobrachium acanthochirus F. Villalobos, 1967 \n* Macrobrachium acanthurus (Wiegmann, 1836) \n* Macrobrachium acherontium Holthuis, 1977 \n* Macrobrachium adscitum Riek, 1951 \n* Macrobrachium aemulum (Nobili, 1906) \n* Macrobrachium agwi Klotz, 2008 \n* Macrobrachium ahkowi Chong & Khoo, 1987 \n* Macrobrachium altifrons (Henderson, 1893) \n* Macrobrachium amazonicum (Heller, 1862) \n* Macrobrachium americanum Spence Bate, 1868 \n* Macrobrachium amplimanus Cai & Dai, 1999 \n* Macrobrachium andamanicum (Tiwari, 1952) \n* Macrobrachium aracamuni RodrÃguez, 1982 \n* Macrobrachium asperulum (von Martens, 1868) \n* Ma