The two main tuna fishing industries that have posed the greatest threats to dolphins are encirclement net fishing off the United States and Latin America, and driftnet fishing in the North Pacific.
兩種主要危及海豚的鮪魚業是在美國、拉丁美洲捕撈黃鰭鮪的圍網漁業，及在北太平洋區捕撈長鰭鮪的流刺網漁業。