This study evaluated the phosphorus inputs, outputs, and accumulation for the phase II production sunshine bass (Morone saxatilis x Morone chrysops) and the giant river prawn (Macrobrachium rosenbergii) grow-outs in monoculture and integrated multi-trophic aquaculture (IMTA) systems. The experiment was completely randomized with four treatments in triplicate: fish monoculture with 2 fish/m2, prawn monoculture with 1 prawn/m2, IMTA with both animals free-swimming at 2 fish/m2 and 1 prawn/m2, and polyculture of the fish reared in cages at 390 fish/cage and prawns free-swimming at 1 prawn/m2. The phosphorus budget was determined by measuring the phosphorus contents of the inputs of the feed, stocked animals, inlet water, and rain, and the outputs of harvested animals, accumulated sludge, total suspended solids, settleable solids, and outlet water collected throughout the experiment. The duration of the experiment was 82 days from June 24, 2025, to September 17, 2025, and phosphorus of the different samples is still being analyzed. The stocking and harvest periods were atypical of the recommended dates for these two species because of unseasonably cold weather in the late spring and late-mid summer. Table 1 shows the productive performance data of the different treatments. Two of the three prawn monoculture ponds had no survival. This may be due to predation from insect larvae, turtles, and/or otters, or perhaps due to temperature fluctuations. The most interesting result thus far is that the freshwater prawns showed some survival when reared with the sunshine bass. Bass are carnivorous and were expected to consume the prawns.