How to Catch Porbeagle Shark: The Complete Guide

The porbeagle shark (Lamna nasus) is the North Atlantic's answer to the mako, a thick, muscular mackerel shark built for cold water and capable of an explosive, powerful fight. Closely related to the mako and the great white, the porbeagle shares that family's warm-blooded, high-performance physiology, which lets it hunt actively in the chilly waters off the UK, Ireland, Canada, and the temperate North Atlantic and Southern Hemisphere. For anglers in these cooler seas, the porbeagle is the premier big-game shark: a stocky, deep-bodied fish that commonly runs well over a hundred pounds and pulls with the dogged, bruising strength of a true heavyweight.

Porbeagles are a beloved sportfishing target, particularly off the southwest of England, Wales, Ireland, and Atlantic Canada, where dedicated charter fleets chase them by drifting and chumming over deep water. They are also a slow-growing, heavily pressured species whose populations were badly overfished, so this is overwhelmingly a careful catch-and-release fishery, and in many jurisdictions retention is restricted or prohibited. This guide covers how to identify a porbeagle, where and when to find them, the heavy tackle and rigs they demand, the baits and chum that draw them, how to handle their powerful fight, and how to release these magnificent cold-water sharks unharmed.

Understanding Porbeagle Shark Behavior

Porbeagles are cold-water sharks, comfortable in temperatures that would slow most sharks down, thanks to their ability to keep their body warmer than the surrounding sea. They range through the temperate North Atlantic and, as a separate population, the cool waters of the Southern Hemisphere, from near the surface down to considerable depths. They favor productive water over the continental shelf, around banks, drop-offs, and areas where currents and bait concentrate, and they move seasonally with water temperature and prey. In the classic UK and Irish fishery, porbeagles come within range of day-boats during the cooler months and shoulder seasons more than the height of summer.

They are fast, active, warm-bodied predators that feed heavily on schooling fish like mackerel and herring, as well as squid and other fish. Like their mako relatives, they hunt largely by tracking scent and movement, and they will follow a chum slick up to its source, which is why drifting and chumming is the standard method. Because they are strong swimmers built for the chase, a hooked porbeagle fights hard, powerful runs and deep, dogged resistance rather than the spectacular jumps of a mako. Their cold-water tolerance and preference for productive shelf water mean the best fishing is often over deep marks during the right seasonal window.

Timing and location matter enormously in the porbeagle fishery. Because these are cold-water sharks, the productive window in a given area is tied to sea temperature and the presence of bait rather than to the warmest days of summer, and local charter skippers build their seasons around it. In the classic UK and Irish grounds, the shoulder seasons and cooler months often fish best, when mackerel and other bait are around and the sharks are working the shelf. Find the deep, current-swept marks where bait concentrates, banks, drop-offs, and the productive water off headlands, and you have found the kind of ground a drifting boat can set a slick over and expect a porbeagle to come up the trail. Watching sea-surface temperature, recent catch reports, and the movement of baitfish is the difference between drifting empty water and drifting where the sharks actually are.

Porbeagle shark fishing overview

Identifying a Porbeagle Shark

The porbeagle is a stout, heavy-bodied mackerel shark with a distinctly conical, pointed snout, large black eyes, and a robust, almost tuna-like build that tapers to a strong, crescent-shaped tail with a keel on the caudal peduncle. Its back is dark bluish-gray to almost black, with a clean white belly. The teeth are smooth-edged, narrow, and blade-like, with small cusps at the base, different from the broad serrated teeth of requiem sharks.

The single best field mark, and the one that separates a porbeagle from the similar shortfin mako, is a distinctive white patch on the trailing (rear) edge of the first dorsal fin. No mako has this white blotch on the dorsal, so if you see it, you have a porbeagle. The porbeagle also has a slightly stouter body and a shorter, more conical snout than the sleek mako. Because these two mackerel sharks are regulated differently and porbeagles are heavily protected in many areas, confirming that white dorsal patch is well worth the look before you handle or make any decision about the fish. It is also a genuinely useful check for the angler's own understanding: knowing at a glance that you have raised a porbeagle rather than a mako tells you a great deal about how the fight will go and how the fish must be handled, so make that dorsal-fin check a habit every time a mackerel shark comes to the boat.

Porbeagle shark fishing from a small boat

Tackle for Porbeagle Sharks

Porbeagles are powerful, thick-bodied fish, and they demand stout big-game tackle. Anglers targeting them use 30- to 80-pound-class conventional outfits: a heavy stand-up boat rod matched to a strong lever-drag reel holding several hundred yards of heavy line. Spool with 50- to 80-pound mono or heavy braid with a mono top shot; mono's stretch helps cushion the surges and head-shakes of a heavy shark. The drag must be strong and smooth, because a big porbeagle will run hard and use its mass to bulldog deep.

From a boat, a good stand-up harness and a fighting belt save your back over a long, heavy fight and let you apply the steady pressure needed to shorten the battle. Because this is largely a release fishery, carry the tools that make release fast and safe: a long-handled dehooker or T-bar, heavy-duty cable cutters or bolt cutters, and gloves. Everything about porbeagle tackle should assume a strong, enduring fish and a careful boatside release rather than a fish coming aboard.

Circle hooks and shark rig setup

The Right Rig and Leader

As with all sharks, the leader is critical. A porbeagle's teeth and rough hide will part monofilament, so you need a bite section of heavy wire or cable, commonly several feet of 200- to 400-pound single-strand wire or multi-strand cable, crimped or twisted to the hook and a strong swivel, with a length of heavy mono above it as a rubbing leader and a boatside handling trace. Because porbeagles often feed in the mid-to-upper water column in a slick, baits are frequently fished suspended under balloons or floats at staggered depths and distances back in the trail rather than on the bottom.

Use non-stainless circle hooks, commonly 8/0 to 12/0, matched to your bait. Circle hooks are strongly preferred and often required, they slide to the corner of the jaw and set there as the shark turns away, producing a lip hookup that is safe to remove and far better for the shark's survival than a swallowed J-hook, and a non-stainless hook will rust out if it cannot be recovered. Do not strike; when a porbeagle takes the bait, let the fish move off, let the line come tight, and let the circle find the jaw hinge. Stagger your baits at different depths in the slick to cover the water column.

Mackerel baits for shark fishing

Bait and Chum

The porbeagle fishery, like the blue and mako fisheries, runs on chum. Because these sharks track scent over long distances, a steady, unbroken chum slick is the heart of the method: anglers drift over deep, productive water while dispensing a constant stream of ground fish, blood, and oil, usually from a mesh bag or chum bucket, creating a scent corridor that draws porbeagles up the trail to the boat. The longer and more consistent the slick, the better your odds; a broken slick lets a following shark lose the trail.

For hook baits, fresh oily fish are ideal and match the porbeagle's natural diet. Mackerel is the classic and outstanding porbeagle bait, a whole fresh mackerel or a "flapper" (a mackerel prepared to release maximum scent) is a go-to, along with other oily fish like herring or a fresh bloody fillet. Rig baits to sit naturally in the slick, staggered by depth, and keep the chum flowing. Patience while the slick works is part of the game, followed by the heavy thump of a porbeagle taking the bait. Keep fresh bait out and refresh the chum bag before it runs dry, because scent is everything in this fishery.

It pays to think about how the slick and your baits work together. The chum draws sharks up the trail, but it is your hook baits that must be there to intercept a shark cruising in on the scent, so spread them thoughtfully through the water column and back down the slick rather than clustering them all at one depth beside the boat. A common approach is to fish several rods at staggered depths and distances, one bait set shallow under a big balloon, others progressively deeper and farther back, so that whatever level a porbeagle follows the scent in, there is a fresh mackerel waiting. Catch your mackerel fresh that morning if you can, because bright, oily bait dramatically out-fishes bait that has been frozen and thawed, and match the freshness of your chum to your hook baits so the whole spread is putting out maximum scent.

The powerful fight of a porbeagle shark

Fighting a Porbeagle Shark

A hooked porbeagle fights like the muscular heavyweight it is. Rather than the aerial acrobatics of a mako, expect powerful, driving runs and deep, dogged resistance, the fish using its thick, warm-bodied strength to bulldog down and away. When the circle hook takes hold, keep steady, heavy pressure and settle in; a good porbeagle can pull hard for a long time. Gain line with smooth lift-and-reel pumps, keep the line tight through the runs, and never give slack, because a rolling or head-shaking shark can chafe the leader or throw a poorly set hook.

Use your body and a harness rather than just your arms, and let the drag and the mono's stretch cushion the surges. From the boat, use the boat to keep a good angle and shorten the fight. Expect the fish to dig deep and to have a strong second wind when it nears the boat. Porbeagles are notorious for a deep, sounding fight where the shark drives straight down and hangs there as dead weight; when that happens, keep steady pressure and lift-and-reel patiently rather than trying to horse it up in one heave, and be ready for it to come alive again the moment it sees the hull. Pumping a heavy fish up from depth is hard work, so pace yourself and let the tackle do its share. Because this is a release fishery, the goal is to whip the fish efficiently on adequate tackle and bring it to the leader in good shape, a drawn-out battle on light gear leaves a porbeagle exhausted and harder to revive. Keep the pressure honest and bring it boatside as cleanly as you can.

Landing and Safe Release

Porbeagles are almost always released, and because they are slow-growing and heavily pressured, a clean release is the whole ethic of the fishery. Do not bring a big porbeagle aboard, keep it in the water alongside the boat, where it stays supported and can breathe. Control the fish by the heavy mono handling trace, stay clear of the mouth and the powerful tail, and work quickly. A landing sling or keeping the fish in the water beside the boat is far better than hauling it onto the deck.

Use a long dehooker or T-bar to pop the circle hook out of the jaw corner in seconds. If the hook is set deep or you cannot reach it safely, cut the leader as close to the hook as possible, a non-stainless circle hook will corrode and fall out, which is far better for the shark than a prolonged struggle. Take any photo quickly with the shark in the water, then support and revive it until it swims off strongly under its own power. Know your local regulations, which in many porbeagle fisheries restrict or prohibit retention, use circle hooks, and handle every one of these superb cold-water sharks with the care its recovering population needs.

Releasing a porbeagle at boatside

Putting It All Together

Catching a porbeagle is cold-water big-game fishing at its finest: drift over deep, productive shelf water during the right seasonal window, set a long, unbroken chum slick, and fish fresh mackerel baits at staggered depths on a heavy wire-leader circle-hook rig. When one eats, hang on for the powerful, driving fight, then bring the fish to the leader efficiently and release it quickly and carefully. Few sharks combine the porbeagle's raw power, cold-water toughness, and sporting quality, and few big-game experiences in the North Atlantic match the thump of a porbeagle loading up your rod.

If you want to target its relatives, the mako shark is the faster, jumping cousin of warmer waters, the blue shark shares the same chum-slick fishery with a lighter build, and the thresher shark is the long-tailed acrobat of the offshore grounds.