Most farmers of livestock and crops have long had access to genetically improved breeds and varieties, but that has not been the case for carp farmers such as Shafiujjaman Momin from Bagatipara upazila of Natore district in northwest Bangladesh. At least, not until now. Momin is taking part in a trial of third-generation (G3) WorldFish genetically improved rohu. WorldFish G3 rohu (Labeo rohita or rui) is expected to grow 30% more rapidly than river-sourced fish. The purpose of the trial, in which Momin is taking part, is to validate these predicted growth rates under real-world, on-farm conditions.