延绳捕鱼是一种商业捕鱼方法，主要在南太平洋用于钓金枪鱼，渔船都是大型远洋捕捞船。

在南太平洋，渔民驾驶着大型远洋捕捞船来到捕捞地点，放下延绳，一般延绳长达几十公里甚至几百公里，每隔一段距离，延绳有一根支线绑在主线上，鱼钩就在支线上，鱼钩多达2500个，放延绳的机器是投绳机和扬绳机，投绳机分为单滚筒延绳钓鱼机和双滚筒延绳钓鱼机。鱼钩上的鱼饵是鱿鱼、秋刀鱼。延绳上面还有浮球和电子鱼漂，收网时，金枪鱼很活跃，为了阻止它跳跃，用电子击鱼器将其电晕。

Longline fishing is a commercial fishing technique. It uses a long line, called the main line, with baited hooks attached at intervals by means of branch lines called snoods (or gangions). A snood is a short length of line, attached to the main line using a clip or swivel, with the hook at the other end. Longlines are classified mainly by where they are placed in the water column. This can be at the surface or at the bottom. Lines can also be set by means of an anchor, or left to drift. Hundreds or even thousands of baited hooks can hang from a single line. Longliners commonly target swordfish, tuna, halibut, sablefish and many other species.