Many wild yellowfin tuna juveniles aggregate around mid-waters fish aggregatingdevices for feeding. The value of the juvenile tuna is low due to their small size. Thegoals of this study attempt to develop tuna culture techniques by fishing the wildjuveniles and transfer them to sea cages or inland ponds and try to establish the pondrearedbroodstock for the purpose of artificial propagation. Technical improvementincludes the enhancement of the survival of fishing and tranportation of wild juveniles.In aspects of broodstock management in the pond, round concrete ponds with watervolume of 80 and 250 tons equipped with re-circulated system are used to stock thebrooder candidates. The behavior, growth, food preference and disease resistance andreproductive biology of yellowfin tuna are expected to be revealed in this study.