Otoliths are data loggers that record both environmental and biological information in their microstructure and microchemistry, which is critically essential for interpreting the life history of fish and constructing environmental history, This information can be used to reveal the age, growth, migration and habitats of fish at either individual or population level.Many techniques have been recently developed for age validation,some of which (e.g.hboom radiocarbon chronometer,radio chemical dation and OTC)have been proven to be robust and reliable in validation the age of the long lived fishes,the species rarely studied in the past.