In April 2016, large numbers of dead fish were found on the coasts of Ha Tinh, Quang Binh, Quang Tri, and Thua Thien Hue in Vietnam. The massive fish kill was caused by water pollution from toxic industrial waste discharged by a steel plant of Formosa Plastics. The company has admitted responsibility for the environmental disaster.

In October 2019, the Taipei District Court dismissed a lawsuit filed by nearly 8,000 Vietnamese fishermen against Formosa Plastics Group over the 2016 marine disaster in Vietnam. The court said that it had no jurisdiction to rule on the case, but the plaintiff's lawyers later filed an appeal.