GT Fishing – Guide to Giant Trevally, Equipment, and Destinations

Giant trevally, or GT, is one of the most sought-after species in tropical sport fishing. GT is primarily caught using fly, poppers, stickbaits, and jigs in tropical parts of the Indian Ocean and the Pacific Ocean.

For fly fishing for GT, a 12-weight rod is typically used, while heavier spin fishing often involves PE6–PE8 rods with large poppers and stickbaits. The fishing can be both technically and physically demanding, but few species can compare to a GT when it decides to strike.

In this guide, we will cover how to fish for GT, what equipment is needed, what experience this type of fishing requires, and how to choose the right destination for your GT trip.

Quick Guide to GT Fishing

Equipment	Recommendation
Fly Rod	12-weight
Fly Reel	12-weight or 12/13-weight
Backing	Approx. 250–300 m, around 80 lb
Fly Line	Tropical 12-weight
Fly Leader	Approx. 100–130 lb
Fly Hooks	Approx. 4/0–8/0
Popping Rod	PE6–PE8
Popping Reel	Approx. 14000–18000
Braided Line	PE6–PE8
Popping Leader	Approx. 130–200 lb
Poppers & Stickbaits	Approx. 100–200 g
Common Methods	Fly, popping, stickbait and jigging
GT Destinations	Maldives, Andamans, and Komodo

Equipment always needs to be adapted to the destination, fish size, currents, and how close to reefs and other structures you are fishing.

What is a Giant Trevally (GT)?

Giant trevally (Caranx ignobilis) is one of the largest trevally species and belongs to the family Carangidae. The species is found in tropical and subtropical parts of the Indian Ocean and the Pacific Ocean.

GT is an aggressive predatory fish that hunts fish, squid, and crustaceans, among other things. It can be found in many different environments, from shallow flats and lagoons to reef edges, seamounts, and current-swept passages.

The fish is built for short, explosive attacks. When a large GT takes a lure near a reef, the fight is rarely about letting the fish run freely. You need to apply pressure early and try to keep it away from corals and other structures.

It is the combination of explosive strikes, raw power, and the environments that has made GT a true icon in tropical sport fishing.

How to Fish for Giant Trevally?

GT is primarily caught using fly, poppers, stickbaits, and jigs. Fly fishing often takes place visually on shallow flats, while popping, stickbait, and jigging are mainly conducted from boats around reefs, seamounts, and current channels.

Which method is best depends on both the destination and the type of sport fishing you are looking for.

How to Fly Fish for GT?

Fly fishing for GT is a visual fishery where you look for fish patrolling flats, lagoons, and reef edges. Once the fish is spotted, the goal is to quickly present the fly in front of it and elicit a reaction from the GT.

Together with the guide, you scout for fish and try to get into the right position. When the opportunity arises, anything can happen in a matter of seconds.

You need to get the fly out quickly, place it in front of the fish, and start stripping immediately. A GT can accelerate towards the fly incredibly fast, and the strike often happens in plain sight.

Therefore, it's not just about casting distance. Speed, precision, and the ability to cast large flies with heavy gear in the wind are equally important.

When the fish takes, the hook set is made with a powerful strip strike. Do not lift the rod as in traditional trout fishing.

Once the hook is set, you need to quickly gain control of the slack line, get the fish on the reel, and start applying pressure. In many GT destinations, coral and reef are close to the fish, and if it gets too much room, the fight can be over quickly.

How to Fish for GT with Poppers and Stickbaits?

Popping and stickbait fishing for GT primarily takes place from boats around reef edges, seamounts, and current-swept passages. It is an active and physical fishery where large lures are cast and worked for significant parts of the day.

Poppers are fished aggressively on the surface, creating a lot of noise and water displacement. Stickbaits offer a different presentation and can be fished both on the surface and just below it.

It is primarily the strikes that make this fishing so special. A GT can follow the lure before suddenly accelerating and attacking on the surface.

When the fish is hooked, it's crucial to apply heavy pressure immediately. GTs use their strength to try to get back to the reef, and this is where both the equipment and the angler are put to the test.

How Does Jigging for GT Work?

Jigging is primarily used when GTs are deeper around reefs, drop-offs, seamounts, and current channels.

Here, shorter and heavier rods are used together with metal jigs that are actively fished through the water column. Jig weight is adjusted primarily based on depth and current.

Jigging is a good complement to surface fishing. When surface activity decreases, fish can still be found deeper along the same structure.

It can also be a truly physical fishery, especially when strong currents and greater depths require heavier jigs.

What Equipment is Needed for GT Fishing?

GT fishing requires heavy-duty equipment where the entire setup is adapted for high stress. Rod, reel, main line, leader, knots, split rings, and hooks need to work together.

One weak component is enough to lose the fish.

However, the equipment differs quite a bit between fly fishing, popping, and jigging.

What Fly Fishing Equipment is Needed for GT?

Fly Rod for GT

A 12-weight rod is our first choice for dedicated GT fly fishing.

It provides enough power to cast large and air-resistant flies in the wind and, equally importantly, enough backbone to apply serious pressure on the fish.

In destinations where truly large GTs are possible, heavier gear may be used, but a 12-weight covers a large part of dedicated GT fishing.

Fly Reel for GT

For a 12-weight rod, a sturdy saltwater reel of approximately 12-weight or 12/13-weight is needed.

The reel should have a strong and smooth drag, a large arbor diameter, and be built for heavy use in saltwater.

We recommend approximately:

• Reel: 12-weight or 12/13-weight
• Backing: approximately 250–300 meters
• Backing strength: around 80 lb
• Fly line: tropical 12-weight

A large arbor diameter is an advantage as it provides fast line retrieve when you need to gain control of the fish.

What Fly Line is Used for GT?

A tropical saltwater line in 12-weight is a good starting point for GT fly fishing.

For classic sight fishing on flats, a floating tropical line is primarily used. The line is built to perform in warm water and high temperatures where regular fly lines can become too soft.

A relatively aggressive taper is beneficial when large and air-resistant GT flies need to be turned over, especially in windy conditions.

Depending on the destination and fishing situation, intermediate or sinking lines can also be used.

What Leader is Used for GT?

Leaders of around 100–130 lb are a good starting point for dedicated GT fishing.

The dimension is adjusted based on the size of the fish, the destination, and the amount of coral and other structure in the area.

Regularly check leader and knots. Coral and heavy strain can quickly damage the material.

What Flies are Used for GT?

GT flies should primarily be tied on very strong saltwater hooks, often around 4/0–8/0.

Common fly types include:

• Brush flies
• Baitfish patterns
• Semper-like flies
• Larger streamers

The exact color, profile, and size vary between destinations and the type of baitfish present in the area.

More important than a specific pattern is that the fly can be cast with your equipment and is tied on a hook that can withstand the strain of a large GT.

What Equipment is Needed for GT Popping?

For GT popping, heavy spinning rods of approximately PE6–PE8 are used together with large spinning reels and PE line of a corresponding class.

A good general GT setup is:

• Reel: size equivalent to 14000–18000
• Rod: PE6–PE8
• Main line: PE6–PE8
• Line capacity: approximately 250–300 meters
• Leader: approximately 130–200 lb
• Poppers and stickbaits: approximately 100–200 grams

A 14000 reel with PE6 provides a slightly lighter setup that is more pleasant to cast with during long fishing days.

For heavier fishing for large GTs, 18000–20000 reels with PE8 are often used. In places where truly large fish need to be stopped immediately, even heavier gear, such as PE10, may be relevant.

Sizes like 14000, 18000, and 20000 are not a universal standard across all reel manufacturers. Therefore, consider them as approximate size classes.

What PE Class Should Be Used for GT?

PE6–PE8 covers a large part of dedicated GT fishing with popping and jigging. PE8 is a common choice for heavier fishing, while PE10 can be used in truly demanding situations.

PE is a Japanese dimensional standard for braided line and should not be directly equated with a specific breaking strength in lb.

A PE8 line from one manufacturer may therefore have a different stated breaking strength than a PE8 line from another.

Therefore, look at both PE class, actual breaking strength, and the reel's line capacity when building your setup.

What Equipment is Needed for Jigging for GT?

For GT jigging, shorter and heavier rods are typically used with PE6–PE8 as a good starting point for heavier fishing.

The shorter rod provides good control over the jig and makes it easier to apply pressure on a heavy fish under the boat.

Both spinning and baitcasting reels are used depending on the preferred type of jigging. The reel needs to have sufficient line capacity and a drag that can handle heavy loads.

Jig weight varies greatly between different destinations. Depth and, above all, current determine how heavily you need to fish to maintain good contact with the jig.

How Much Drag is Needed for GT Fishing?

GT fishing requires high drag power, especially when the fish strikes near coral reefs and other structures. However, the exact drag force should be adapted to the entire equipment.

When a GT strikes near a reef, there are often only a few seconds between a successful hook-up and a fish that has already dived into the corals.

This does not mean that the drag should always be fully tightened. The drag force must be balanced against the rod, line, leader, hooks, and knots.

Get to know your equipment before the trip. Test the drag under load and check knots, hooks, and split rings.

When the dream fish strikes, it's too late to discover which part of the equipment was the weak link.

Is GT Fishing Difficult?

Yes, dedicated GT fishing can be both technically and physically demanding, but the difficulty largely depends on the method you choose.

Fly fishing primarily requires casting technique and speed, while popping and jigging demand more physical endurance.

How good do you need to be at fly fishing?

For GT on fly, we recommend that you are already a relatively experienced fly angler.

You need to be able to handle a 12-weight rod, cast large flies, and deliver a fast and precise cast when the guide finds the fish.

However, you don't need to be an extreme distance caster. The ability to quickly and precisely deliver the fly at about 20–25 meters, even in the wind, gives you good prerequisites.

Also practice the strip strike before the trip. It should ideally be ingrained when a GT finally eats the fly.

How demanding are popping and jigging?

Popping and jigging are easier to get into in terms of casting technique, but the fishing can be very physical.

Casting and working poppers and stickbaits weighing 100–200 grams for several hours and several days in a row takes a toll on the body.

We therefore recommend that you train with roughly the same rod and lure weights that you will use on the trip. A few sessions before departure will make a big difference once you are at the bow of the boat.

Where Can You Fish for Giant Trevally?

GT is found in tropical and subtropical parts of the Indian Ocean and the Pacific Ocean. The Maldives, the Andamans, and Komodo are three destinations where we arrange dedicated GT fishing.

However, the fishing experience varies greatly between these destinations.

Therefore, it's not just about choosing a place where GT exists, but about choosing a destination that offers the type of GT fishing you actually want to experience.

GT Fishing in the Maldives

The Maldives is particularly suitable for anglers who want to combine tropical fishing with the opportunity to sight fish for GT on shallow flats.

Here, you look for GTs patrolling shallow areas, lagoons, and reef edges. Once a fish is spotted, the goal is to quickly get into position and present the fly.

For the fly angler, the ability to see the fish, make the cast, and witness the entire attack is a major part of the experience.

The fishing can also be combined with species like triggerfish and bonefish.

However, GT on fly is not a numbers game. Some days you get several chances, and other days you work long for a single fish. When the opportunity arises, you need to be ready.

Read more about fishing trips to the Maldives – GT, bonefish, and triggerfish →

See Fly Package Maldives GT – flies and equipment adapted for GT in the Maldives →

GT Fishing in the Andaman Islands

The Andaman Islands are suitable for the more experienced angler seeking intense tropical fishing with a strong focus on popping and jigging from a boat.

Here, you fish reefs, seamounts, and current channels with heavy equipment. GT is one of the main species, and large poppers and stickbaits are a central part of the fishing.

This means long days on the water and a lot of casting. If your goal is to spend a lot of time on heavy GT fishing, the Andaman Islands are an interesting option.

Read more about popping and jigging in the Andaman Islands →

GT Fishing in Komodo

Komodo is suitable for anglers seeking active boat fishing with popping and jigging in strong currents.

The area consists of islands, reefs, deep passages, and strong currents that create interesting hunting grounds for GT.

Here, robust equipment is important. PE8 is a good starting point for much of the heavier GT fishing, while heavier gear may be needed when conditions or fish size require it.

Komodo also offers the opportunity to combine GT fishing with several other tropical species.

Read more about popping and jigging in Komodo, Indonesia →

Which GT Destination Should You Choose?

The Maldives is primarily suitable for those who want to fly fish and sight fish on flats, while the Andaman Islands and Komodo are more focused on heavy boat fishing with popping, stickbaits, and jigging.

The best destination therefore depends on your preferred fishing method, your experience level, and the type of trip you are looking for.

If you are unsure which setup suits you, talk to us and we will help you choose the right GT trip based on your fishing, your experience, and what you want to get out of the trip.

Common Questions About GT Fishing