Fly fishing for giant trevally (GT) is widely regarded as one of the most thrilling and
adrenaline-pumping pursuits in the sport. Known as the “gangsters of the flats,” GTs
are the ultimate predators—fast, aggressive, and incredibly strong. Hooking a GT is
like battling a freight train; they hit flies with explosive force and test the limits of your
tackle and skill. Beyond their raw power, the environments they inhabit are
breathtaking, adding to the allure of targeting this apex species.
Giant trevally thrive in tropical and subtropical waters, typically in the Indian and
Pacific Oceans. They are highly versatile predators, found patrolling coral reefs,
lagoons, and sandy flats, as well as around rocky outcroppings and channels with
strong tidal currents. On the flats, they are often seen hunting in shallow, crystal-
clear waters, where their silvery-black bodies contrast with the vivid blues and
greens of their surroundings. These environments not only provide ideal hunting
grounds for GTs but also offer anglers stunning, remote backdrops for their
adventures.
Targeting GTs on a fly rod is an exciting and demanding challenge. These fish are
opportunistic feeders, preying on baitfish, crabs, squid, and even birds. The key to
success is spotting them before they see you—a task that requires sharp eyes and
careful planning. Anglers often work with skilled guides, who scan the flats for
cruising or hunting GTs. Once located, presenting the fly quickly and accurately is
critical. Large, flashy baitfish patterns tied on heavy-duty hooks are typically used, as
they mimic the prey GTs favour.
The take is where the real excitement begins. A GT will charge the fly at full speed,
often creating a heart-stopping explosion of water. Once hooked, their sheer power
and determination kick in. They will test every aspect of your setup, peeling line off
your reel at alarming speeds and making strong, unpredictable runs toward coral
heads or deeper water. It’s a battle of endurance, with the angler needing to apply
maximum pressure to turn the fish without breaking the line or leader.
Giant trevally are found in some of the world’s most exotic destinations. The
Seychelles, particularly the outer atolls like Providence, Alphonse and Cosmoledo,
are legendary for GT fishing. Other prime spots include Christmas Island, Australia’s
Great Barrier Reef, Oman, and the tropical waters of the Maldives.
Fly fishing for giant trevally combines power, precision, and breathtaking beauty. For
those seeking the ultimate saltwater fly fishing experience, the GT is a bucket-list
species that will challenge and inspire you in equal measure.