This document outlines a projection model for the global fish supply and demand to the year 2050. The model uses climate, hydrology, crop, and economic trend data across 159 regions to project production and consumption for 16 fish species categories. The fish projection model balances supply and demand at both the global and country levels, taking into account factors like net imports, feed conversion ratios, and the use of fish for feed versus food. The model will analyze pathway options and scenarios to provide implications for investments, aquaculture development, and environmental management through 2050.