Technical Abstract: Our objective was to produce a unique feed ingredient from underutilized walleye pollock (Theragra chalcogramma) and pink salmon (Oncorhynchus gorbuscha) testes. Protein contents in meals from both species were above the values found in high quality herring meals, but both were poor in some essential amino acids; however, both were good sources of the amino acid taurine. Pollock meal was very rich in phospholipids and essential polyunsaturated fatty acids, indicating a potential role as a larval starter feed ingredient. Purine contents in both pollock and salmon testes meals were very high when compared to other fish byproducts or commercial fishmeals. The high concentrations of purines found fish testes make it also an ideal dietary supplement candidate to act as an immune system stimulant. In summary, the salmon meal was high in purines, but overall, the pollock meal had better nutritional qualities.