Genetic resources carrying vital value for the future and decreasing day by day due to various reasons. It is well known that significant portion of animal genetic resources at danger of extinction. In this context, aquatic organisms that have a significant share in animal genetic resources, have not been conserved enough and many of them have been extincted or in danger of extinction. This situation has been increasing the importance of cryobiology as a science that examining effect of ultra-low temperatures on cell, tissue, organ and organisms and also freezability of these structures maintaining their viability. Better understanding of functional properties of thawed cells following freezing process have been accelerating development of the cryobiology. Nowadays, it is possible to establish gene banks by the way of cryobiology in the field of aquaculture.