In the past 5 years, Vietnam tuna export volume and value has been increasing. The tuna export proportion of total seafood export value has also been reporting a year on- year growth.Vietnam tuna is more consumed in the global markets. In the past 5 years, the number of tuna importers from Vietnam has risen from 83 to 96 ones along with the growth in their tuna import value, showing that Vietnam tuna demand from the world market is increasing. The number of Vietnam tuna exporters rose from 70 ones in 2007 to 144 ones in 2010. However, until 2011, the number reduced to 114 ones because many of them switched to business other seafood items due to shortage of raw tuna supply. In 2012, the tuna sector continues to face common difficulties of fishery industry such as dwindling in tuna stock leading to serious scarcity of raw tuna for processing and exporting. According to experts, in long-term, tuna is expected to hold the third position after shrimp and pangasius in export value of Vietnam. To achieve this target, it is necessary to protect and restore tuna resources, ensure both the production and quality of raw tuna caught domestically or imported from other countries for processing and exporting. To use effectively tuna output (both domestic and imported), there is a need of accurate statistics on Vietnam tuna stock.