Roy Koushik is a circular and sustainable aquaculture system biologist concentrating on the issues of improved resource (nutrients, biomass) use efficiency of Central European fishponds, intensive aquaculture, and farm-to-fork. Presently employed at FROV, University of South Bohemia in Ceske Budejovice.

His expertise includes aquatic animal nutrition, aquaculture environment interactions, climate change, and inland fisheries. He grew up in West Bengal (India) where 'fish for food security' and 'resource circularity for economic reasons' have historical roots.