The rapidly changing climatic condition coupled with habitat destruction, aquatic pollution and increasing anthropogenic pressure on water bodies have resulted in decline of many important fish population and some of them even become endangered. As of now the breeding protocol for seed production in captivity is developed for only handful of fish species and mostly their seed is collected from natural resources for aquaculture. This factor limits the efforts for species diversification in aquaculture. There are approaches/ technologies to generate seed of such fish species for aquaculture, especially the species that are too large to propagate in captivity or species those do not response to hormonal treatments due to stress of confinement. One of the viable approach is surrogate broodstock development using adult fish as the recipient. The obvious advantage of using adult fish as recipient is that, the donor-derived gametes can be generated within few months after stem cell transplantation; oppose to using embryos or young hatchlings those take years together to attain sexual maturity. Note: T& F does not sell or distribute the Hardback in India, Pakistan, Nepal, Bhutan, Bangladesh and Sri Lanka.