The results of the 1963 feeding trials may be summarized as follows: (1) Fish fed a vitamin-supplemented all-meal diet were maintained successfully for 24 weeeks with low mortality; (2) Rancidity in salmon carcass meal as indicated by a high TBA value reduced growth; (3) Fish that received meat supplements deposited more protein but did not have more efficient protein utilization than fish fed all-meal diets; (4) soybean oil meal was an inadequate replacement for cottonseed meal when fed as a component of the basal ration; (5) increasing the caloric level of a diet produced a sparing action on the protein requirements of the fish; (6) blood characteristics of fish from all diets were similar and satisfactory; (7) Fish fed with the meat-control diet had fatty infiltrated hepatic cells, which was not the case with fish fed the all-meal diets.