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The number of active vessels in 2018 was 12 for longline fishery and 2 for purse seine fishery. With this fishing capacity, Korean tuna longline fishery caught 2,815 ton in 2018, which was 7% lower than that of 2017. The fishing efforts in 2018 were 6,052 thousand hooks and distributed in only the western Indian Ocean, while the fishing efforts averaged for 5 recent years (2014-2018) were 6,348 thousand hooks and distributed in the western tropical areas around 0-20°S as well as in the western and eastern areas around 20°S-40°S. Since 2015, some vessels have moved to the western tropical area between 5°N-10°S to fish for bigeye tuna and yellowfin tuna. Korean tuna purse seine fishery in the Indian Ocean recorded 19,259 ton in 2018. In 2018, 2 vessels of Korean tuna purse seine fishery operated mainly in the western and central tropical areas around 10°N-10°S to fish for skipjack tuna and yellowfin tuna. The fishing efforts in 2018 were 522 sets, which mainly distributed in the western and central tropical areas around 40°E-70°E. In 2018, 3 scientific observers for longline fishery and 1 scientific observer for purse seine fishery were dispatched onboard for implementing observer program and scientific data collection, which carried out 4.0% and 17.0% of observer coverage in terms of the number of hooks and sets, respectively.
