Two Taiwanese longline fishing fleets, the large-scale longline fleet of above 100 GT
and small-scale longline fleet of below 100 GT, are operating in the Indian Ocean. In
2019, the total catches were 49,648 tons for large- scale longline fleet and 31,469
tons for small-scale longline fleet, respectively. In 2019, there were 45 observers
dispatched to the fishing vessels in the Indian Ocean. And there were 25 observers
deployed on large-scale tuna longliners with 2,624 fishing days observed and 20
observers deployed on small-scale tuna longliners with 1,561 fishing days observed.