Selecting Product Species for Aquaculture Companies: A Spherical Fuzzy Delphi–CRADIS Framework

Developments in the aquaculture sector have broadened the commercial reach of products. Parallel to this expansion, seafood is becoming increasingly important in human nutrition due to its low cost and high protein content. This study seeks to identify marine aquaculture species that can be cultivated in the Eastern Black Sea Region. It also determines the criteria used in marine aquaculture species evaluation. In this regard, the importance of the criteria and the degree of preference for the management options are determined. To accomplish these objectives, the t-spherical fuzzy-Delphi-subjective weighting approach-compromise ranking of alternatives from distance to ideal solution (CRADIS) methodology is employed. The study finds that euryhaline capability, ecosystem effect, habitat suitability, and temperature tolerance are important determinants in seafood aquaculture production. Rainbow trout is the most ideal option, followed by Black Sea salmon, brown trout, seabass, and seabream. The study emphasizes the importance of environmental, sustainable, and customer-focused principles in marine aquaculture management.