Marlin fishing or billfishing is an offshore saltwater game fishing targeting several species of fast-swimming pelagic predatory fish with elongated rostrum collectively known as billfish, which include those from the families Istiophoridae (marlin, spearfish and sailfish) and Xiphiidae (swordfish). It is considered by some fishermen to be a pinnacle of big-game fishing, due to the size, speed and power of the billfish and their relative elusiveness.

Of all the billfish species, 10 of them are of the most interest to blue water anglers: Atlantic and Pacific blue marlin, black marlin, white marlin, striped marlin, Atlantic sailfish, Indo-Pacific sailfish, longbill spearfish, shortbill spearfish and the swordfish.

Fishing for marlin captured the imagination of some sport fishermen in the 1930s, when well-known angler/authors Zane Grey, who fished for black, striped and blue marlin in the Pacific, and Ernest Hemingway, who fished the Florida Keys, Bahamas and Cuba for Atlantic blue marlin and white marlin, wrote extensively about their pursuit and enthused about the sporting qualities of their quarry. These days, a lot of resources are committed to the construction of private and charter billfishing boats to participate in the billfishing tournament circuit. These are expensive purpose-built offshore vessels with powerfully driven deep sea hulls. They are often built to luxury standards and equipped with many technologies to ease the life of the deep sea recreational fisherman, including outriggers, flying bridges and fighting chairs, and state of the art fishfinders and navigation electronics.Janiskee RL (2008) Tourism and recreation in the Carolinas In: DG Bennett and JC Patton, A geography of the Carolinas, pp. 201–202, Parkway Publishers. .

Blue marlin

The blue marlin of the Atlantic and Pacific oceans is the most pursued marlin species by sport fishermen. Its wide distribution in tropical oceanic waters, and seasonally into temperate zones, makes it accessible to many anglers. It is also sought for its potential to reach large sizes and for its fighting ability.

Biology and life history

Blue marlin are one of the world's largest bony fish and although adult males seldom exceed , females may reach far larger sizes well in excess of . A Pacific blue weighing caught in 1970 by a party of anglers fishing out of Oahu, Hawaii, aboard the charter boat Coreene C skippered by Capt. Cornelius Choy (this fish often referred to as "Choy's Monster") still stands as the largest marlin caught on rod and reel. This fish was found to have a yellowfin tuna of over in its belly. In the Atlantic, the heaviest sport-fishing capture is Paulo Amorim's fish from Vitoria, Brazil. Commercial fishermen have boated far larger specimens, with the largest blue marlin brought into Tsukiji market in Tokyo supposedly weighing a massive .

A blue marlin over 1,000 pounds (450 kg) is known as a "grander". Fish of this size are very difficult to catch, making them highly valued amongst anglers.

Blue marlin occur widely in the tropical oceanic waters of the Atlantic and the Indo-Pacific, with many fish making seasonal migrations into the temperate waters of the Northern and Southern Hemispheres to take advantage of feeding opportunities as those waters in spring and summer. Warm currents such as the Gulf Stream in the western Atlantic and the Agulhas Current in the western Indian Ocean serve as oceanic highways for blue marlin migration, and have a major influence on their seasonal distribution. Blue marlin have a limited ability to thermoregulate, and the lower limit of their temperature tolerance is thought to be in the region of about although individual fish have been caught in cooler temperatures. Larger individuals have the greatest temperature tolerance, and blue marlin encountered at the limits of their range tend to be large fish. This wide distribution brings blue marlin in contact with anglers in many parts of the world.

Blue marlin are eclectic feeders preying on a wide range of prey species and sizes. Scientific examination of blue marlin stomach contents has yielded organisms as small as miniature filefish. Common food items include tuna-like fishes, particularly skipjack tuna and frigate mackerel (also known as frigate tuna), squid, mackerel, and scad. Of more interest to sport fishermen is the upper range of blue marlin prey size. A white marlin has been recorded as being found in the stomach of a blue marlin caught at Walker's Cay in the Bahamas, and more recently, during the 2005 White Marlin Open, a white marlin in the class was found in the stomach of one of the money-winning blues. Shortbill spearfish of have been recorded as feed items by Kona blue marlin fishermen. Yellowfin and bigeye tuna of or more have also been found in the stomachs of large blue marlin.

Fishing techniques Fishing styles and gear used in the pursuit of blue marlin vary, depending on the size of blue marlin common to the area, the size of fish being targeted, local sea conditions, and often local tradition. The main methods used by sport fishermen are fishing with artificial lures, rigged natural baits, or live bait.

Natural bait fishing The pioneers of blue marlin angling employed natural baits rigged to skip and swim. Today, rigged baits, particularly Spanish mackerel and horse ballyhoo continue to be widely used for blue marlin. Also, the American eel is considered to be one of the best rigged baits due to its natural swim tendencies when properly rigged. Trolling for blue marlin with rigged baits, sometimes combined with an artificial lure or skirt to make "skirted baits" or "bait/lure combinations", is still widely practiced, especially along the eastern seaboard of the United States and in the Bahamas, the Caribbean, and Venezuela. Rigged natural baits are also used as "pitch baits" that are deployed after fish are raised to hookless lures or "teasers".

Artificial lure fishing Blue marlin are aggressive fish that respond well to the splash, bubble trail, and action of a well-presented artificial lure. Trolling with lures is probably the most popular technique used by blue marlin crews today. Hawaii is recognized as the birthplace of lure trolling for marlin, with skippers operating from the Kona Coast of the Big Island of Hawaii developing many designs still used today. The earliest marlin lures were carved from wood, cast in drink glasses, or made from chrome bath towel pipes and skirted with rubber inner tubes or vinyl upholstery material cut into strips. Today, marlin lures are produced in a huge variety of shapes, sizes, and colours, mass-produced by large manufacturers and individually crafted by small-scale, custom makers.

A typical marlin lure is a small (), medium () to large ( or more) artificial with a shaped plastic or metal head to which a plastic skirt is attached. The design of the lure head, particularly its face, gives the lure its individual action when trolled through the water. Lure actions range from an active side-to-side swimming pattern to pushing water aggressively on the surface to, most commonly, tracking along in a straight line with a regular surface pop and bubble trail. Besides the shape, weight, and size of the lure head, the length and thickness of skirting, the number and size of hooks, and the length and size of the leader used in lure rigging all influence the action of the lure: how actively it will run and how it will respond to different sea conditions. Experienced anglers often fine-tune their lures to get the action they want.

Lures are normally fished at speeds of ; faster speeds in the range are also employed, primarily by boats with slower cruising speeds traveling from spot to spot. These speeds allow quite substantial areas to be effectively worked in a day's fishing. A pattern of four or more lures is trolled at varying distances behind the boat. Lures may be fished either straight from the rod tip ("flat lines"), or from outriggers.

Live-bait fishing Live-bait fishing for blue marlin normally uses small tuna species, with skipjack generally considered the best choice. As trolling speed is limited because baits must be trolled slowly to remain alive, live-baiting is normally chosen where fishing areas are relatively small and easily covered, such as near fish aggregating device buoys and in the vicinity of steep underwater ledges.

Blue marlin angling destinations Areas where bottom structure (islands, seamounts, banks, and the edge of the continental shelf) creates upwelling, which brings deep nutrient-rich water close to the surface, are particularly favoured by blue marlin.

Atlantic In the western Atlantic, blue marlin may be found as far north as George's Bank and the continental shelf canyons off Cape Cod, influenced by the warm current of the Gulf Stream, and as far south as southern Brazil. In the eastern Atlantic, their seasonal range extends northward to the Algarve coast of Portugal and southward to the southern coast of Angola.

Atlantic blue marlin were first consistently caught by sport fishermen in the early 1930s, when anglers from Florida began to explore the Bahamas. Authors such as Ernest Hemingway and S. Kip Farrington did much to attract the attention of big-game anglers to the Bahamian islands of Bimini and Cat Cay. After the Second World War, and especially from the 1960s onwards, anglers began pursuing and finding blue marlin in destinations all over the tropical and subtropical Atlantic.

Bahamas The Bahama Islands have long been popular destinations for fishermen seeking blue marlin. Bimini, located at the eastern edge of the Gulf Stream, has the longest history of blue marlin fishing in the islands, dating back to the 1930s and 1940s when anglers such as Michael Lerner, Ernest Hemingway, and S. Kip Farrington fished there . From the 1960s, more outlying areas such as Walker's Cay and the Abaco islands have developed as blue marlin grounds. The Bahamas is home to one of the most intensely competitive tournament series in marlin fishing, the Bahamas Billfish Championship.

Bermuda The banks lying off the hook-shaped island of Bermuda consistently produce blue marlin. Many Bermudian fish are small specimens in the class, but every year much bigger fish in the and larger class are caught. A giant boated aboard the Mako IV, skippered by Captain Allen DeSilva, in 1995, stands as the largest blue marlin caught in Bermudian waters. This fish is also one of the largest blue marlin ever boated in the Atlantic.

Brazil Blue marlin are fished by sport fishermen operating from several locations along the Atlantic coast of Brazil. Blue marlin have been encountered as far south as São Paulo, and are regularly hooked and caught in annual tournaments held offshore of Rio de Janeiro. However, the majority of international attention has thus far focused on Canavieiras, the gateway to the Royal Charlotte Bank, an extensive area of bottom structure that holds billfish, tuna, and other pelagics in great numbers; and on Cabo Frio, where an annual tournament has produced several fish weighing in excess of .

The city of Vitória is considered one of the finest locations for blue marlin fishing by many anglers. Fishing is a popular activity in Vitória, attracting fishermen from other states and countries due to the large population of marlin and sailfish off the coast of Espírito Santo. Largest of the many big blue marlin caught at Vitória is the International Game Fish Association all-tackle record, held by Paulo Amorim, who caught a blue marlin that weighed .

Cape Verde Islands