Fish drying is one of the key processes in fish meal production. The prime reason for fish drying is to reduce the moisture content of the non-aqueous material to such a level that insufficient water remains to support the growth of the micro-organisms which feed on it. This level is also sufficiently low to stop chemical degradation. It is necessary to dry the fish as quickly as possible from 45 to 60% moisture content to 10% moisture or less (Ruiter, 1995). Fish drying is the processes that most affect the protein quality. Fish proteins are affected when exposed to high temperature for long period. This affects the nutritional value of fish. When the fish temperature is kept below 70°C during this process, the drying time and heat affect very little the protein quality. Exposure to high temperature for very short time (1 to 10 min) will have little effect on protein quality (Keller, 1990). For Salmon and Mink feeds, special low temperature fish meals have been found to give higher feed intake and better growth (Pike, 1989).