This book content study on excellent candidate an aquaculture sector in caviar producing countries and meet producing countries. This species has introduced to South Korea as apart of aquaculture. Main target to produced and optimizing caviar production. However, small stages (larval, juvenile) growing very fast rather than other fish. Identifying different expression patterns and stages and sequencing of growth hormone also one of the main critical point which has focused. Also this species has phylogentic relationship with common ancestor gene. therefor, this will support as flat form to study genetics expression and hormone gene structures. with this book, providing opportunity for sharing knowledge, with others. study on primitive fish is most advantage event.