Longline fishing is a popular method of fishing that involves using a long fishing line with multiple hooks. This technique is commonly used in commercial fishing and is known to catch a large number of fish in a single operation. There are a few other terms that are sometimes used interchangeably with "longline fishing." One of the synonyms used for "longline fishing" is "pelagic longline fishing." This term refers to fishing for pelagic fish, which are ones that swim in the open ocean, using longlines. Another synonym is "deep-sea longlining," which refers to the use of longlines in deeper waters. Finally, "surface longlining" is another synonym for longline fishing. This term specifically refers to fishing in the upper layers of the water column, where pelagic fish tend to swim. Regardless of the term used, longline fishing is a popular and effective way to catch fish in a commercial setting.