Despite the immense benefits to the rural economy and improvements in poultry production technology, poultry farming causes some serious concerns related to the environment, viz greenhouse gas emissions and water and air pollution. Various kinds of waste materials in poultry production, especially poultry litter and manure, can seriously threaten the environment as well as human health; this must be managed properly. To lessen enormous pressure on the environment as well as resource consumption, circular bioeconomy plays a considerable role. This study seeks ways to address the environmental issue of poultry litter and manure by applying this waste as fish feed in the context of circular bioeconomy. The present study focused on sustainable farming practices by linking poultry farming with fish farming in South Damodar region, Purba Bardhaman district of West Bengal. Under this farming practice, fish farmers collect poultry litter and manure waste from their nearest egg-producing company, and the nearest broiler farmers working under the contract farming system. After this, fish farmers convert it into a valueadded resource for the fishery sector by using this waste as fish feed. The study found that by linking fish farming with poultry farming, poultry manure and litter considerably contribute to fish feed in comparison with other groups of fish feed. This study also observed that there is a significant improvement in technology adoption in terms of manure management. Finally, this study suggests some policy implications for the development of poultry and fish farming.