The tuna is one of the most appreciated sea fish. Because of it's body shape, speed and agility, the tuna is an excellent hunter and feeds itself with other smaller fish, crabs and cephalopods. There are eight types of this fish, but the biggest and most valued one is the blue fin tuna ''Thunnus Thynnus''. Tuna meat is extremely nutritive since it contains a high percentage of protein and very few fats. This makes it a perfect meal for sportsmen or people with high phisical acivity, also an excellent choice for a healthy diet and prevention of various diseases.It represents one of Croatia most important export products which is targeted towards the Japanese market. In Croatia, the tuna is most commonly breeded and fed in special cages so it can meet the requirements needed for export. The cage breeding is a relatively new activity in Croatia, started about ten years ago, but it represents sort of a revival of the croatian fishing industry. The blue fin tuna ''Thunnus Thynnus'' is the most breeded one and because of it's high quality meat it reaches high prices on the Japanese market.The years of uncontrolled fishing of tunas' have helped the development of the black market which brough to question the survival of the species. In that regard, the International comission for the preservation and protection of the atlantic tuna (ICCAT) was established and it's core function is monitoring the state of the resources of tuna and similar species. Based on the evaluation of resources, yearly safety measures and quotas are determined for each member state. Croatia is a full member of the ICCAT since 1997.Croatia mostly exports fresh, chilled or frozen meat of the atlantic bluefin tuna and imports processed and canned tuna of different sorts. Quantitatively speaking, the export and the import are quite the same, but, because of the high quality of the products, exports bring more revenue and keeps a positive foreign trade balance. According to research, Croatia is the leading country in Europe in the quantity of breeded Atlantic blue fin tuna. Tuna farming in croatia represents a relatively young activity, regardless a very important one which needs to be encouraged and promoted because of it's importance to the Croatian economy and foreign trade policy.