Every day, commercial fishing fleets dispatched primarily from just 11 nations venture onto the high seas to fish the deep ocean with seabed trawls.

• 一张拖网就能网起成堆的海绵，珊瑚及其它物种，总重量可达1万磅。拖网过后留下的只是一片荒凉，贫瘠的海底沙漠。