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.
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.
Giant trevally are found in some of the world’s most exotic destinations and the prime spots are:
The Seychelles, Christmas Island, Australia’s Great Barrier Reef, Oman, and the tropical waters of the Maldives.
If you’d like to know more about these incredible fish and the waters in which they are found, Peter McLeod’s book GT – A Fly Fishers Guide to Giant Trevally is an excellent place to start.
To discuss giant trevally fishing ideas, please contact Olly Thompson or Peter McLeod or call the office on +44 1980 847389.
About the author: Peter McLeod