Since 1973, a new method for mass production of Macrobrachium rosenbergii post-larvae has been set up in french Polynesia in CNEXO-COP centre in collaboration with Territorial Fisheries Service. The larvae are reared in clear water daily renewed, without phytoplankton and at hight density. 90 post-larvae per liter are obtained within six weeks on a diet of Artemia nauplii and inert particles. Since 1976, a pilot hatchery is working and ten pilot scale productions gave 4.6 million juveniles. The technology is described and the production costs discussed. [NOT CONTROLLED OCR]