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Recirculating Aquaculture System (RAS) is introduced in aquaculture farming industry to reduce water resource utilization, efficient the energy and land uses, and also help minimalize the water exchange. This system enables utilization of unsuitable land and promotes a sustainable environment in aquaculture industry. Furthermore, this technology has been established and proved efficient in monitoring the aquatic animal condition subsequently helps in maintaining the water quality and help remove solid particle wastes from the aquaculture treatment. As today, RAS has been developed with more effective technologies such as the use of UV irradiation, solid capture, protein skimmer and also provided with highly techno bio-filtration set. Basically, this system was applied for broodstock maturation, nursery phase, and grow-out production. In this review article, we provide an overview of RAS between the clear water, probiotic, and biofloc technology, and the advantages of its combination. Even though RAS and biofloc is two different parallel system, the application of the probiotic and biofloc in the semi-RAS application system is intense to be investigated. The synergistic effect of RAS using this combination towards high yield aquaculture production will be highlighted in this review paper. Expectantly this review paper will generate awareness and useful information on the RAS application in the aquaculture system operation with help in maximize the impact to the aquaculture yield production. [ABSTRACT FROM AUTHOR]

Shellfish aquaculture is a global industry that provides valuable source of seafood and protein for human consumption. However, the cultivation of shellfish generates significant amounts of pollutants and wastewater, bringing negative impacts on the aquatic environment. This review provides an in-depth exploration of the shellfish aquaculture system and the potential environmental impacts of the operation and the resulting wastewater for shellfish and ecosystems. This is followed by discussion on current technologies and practices used to treat shellfish wastewater, highlighting the importance of using sustainable approaches to reduce the environmental footprint of shellfish aquaculture industry. This review also provides a comprehensive review of the recent advances in microalgae and biofloc technologies for bioremediation of wastewater, exploring its principles, benefits, and potential implications for the aquaculture industry. By shedding light on this innovative technology, the aim is to promote further research in the field of sustainable wastewater treatment for aquaculture industry towards achieving food security. • Environmental impacts of shellfish aquaculture are reviewed. • Sustainable approaches to reduce environmental footprint of aquaculture are reviewed. • Nutrient removal pathways in improving water quality are discussed. • Envisioning a symbiotic relationship to foster the revitalization of aquatic environments. • Microalgae and biofloc are emerging technologies for sustainable growth of shellfish. [ABSTRACT FROM AUTHOR]