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    Bluefin trevally caught on a fly with Alphonse Fishing Company

    The bluefin trevally

    Considered by many anglers as the most beautiful fish in the Carangidae family for its unique mix of colours and a variety of shades from blue to yellow, fly anglers queue up to enjoy the power of the bluefin trevally’s fighting.

    The bluefin trevally (Caranx melampygus) has an oblong body with a moderately steep forehead. The overall body colour is dark, dusky green with electric blue markings, especially along the dorsal fin base and the rear, straight region of the lateral line. The flanks and the dorsal surface are densely patterned with small, grey to black spots which are frequently iridescent blue. The fins are translucent or dusky, except for the dorsal and anal fins that are brilliant blue while the pectoral fins are yellow. The bluefin trevally is also known as the bluefin jack, blue ula or spotted trevally.

    Key facts about the bluefin trevally

    • Bluefin trevally average length 60 cm
    • Bluefin trevally average weight 3 - 7 kg
    • Bluefin trevally diet Carnivore
    • Bluefin trevally time to maturity 2 years
    • Bluefin trevally average age 4 years

    Finding a Bluefin Trevally

    This beautiful fish has a great affinity for coral and rocky regions where it usually hunts in small groups about a meter above the reef. The bluefin trevally covers large areas in search of prey and its diet includes other smaller fish, shrimps, mantis shrimps, squids and a variety of crabs.  It has a habit of following larger fish which may assist it by driving out hidden prey, and we see this often as the bluefin will swim among a school of giant trevally.

    Best flies for bluefin trevally

    Over the years many methods have been hatched to catch the bluefin trevally with fly fishing tackle. 

    • Alphlexo crab

      Alphlexo Crab is a very realistic imitation of a real crab. It’s a mesh body with a set of 6 legs made of micro chenille and a little bit weighted to be sure it sinks better and faster. Generally we want to use it in olive, tan, white or brown to match the colour of the bottom or the habitat that we are fishing in.

      available On Island
    • Clouser minnow

      On sizes 1/0 to 3/0 this fly imitates a swimming shrimp or even a baitfish. Generally we want this fly to be a bit heavier, so we tie it with dumbbell eyes or even tungsten eyes. Chartreuse over white, tan-white, blue-white or all brown seem to work well. We cast the fly and let it sink a bit, and then we strip fast but long strips. Strikes are quite strong.

      available On Island
    • Deceiver

      Bluefin Trevally prey on a large variety of food; however, they love to eat smaller baitfish that keep in tight shoals. A Deceiver pattern imitates these small fish and this is the reason why it is so effective. It works best if it is lightly dressed i.e: tied sparsely and stripped through the water as fast as possible.

      available On Island
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    Best fly rods for bluefin trevally

    Fly fishing is an art form that not everyone can master. It takes skill, patience, determination and knowledge. The right rod will take you a lot closer to landing the catch. Bluefin trevally are the smaller cousins of the much larger giant trevally; however, they also deserve their fair share of respect as they are exceptionally powerful. Having a fast action rod to get the fly out in front of the fish is important and having enough pulling power in the rod to keep them away from going into the corals is essential. The best weighted rods to target this species will therefore be 10 to 11 weight rods.

    Best Tides


    Pushing tides, especially the beginning of the push during a spring tide, is often a very good time to fish for bluefin trevally in the surf. On the low tide, all of the prey such as mullet, brassy trevally and bonefish are waiting at the edge of the lagoon or outside the reef to get back onto the flats. When the push begins, the fish start to move with the predators like bluefin in pursuit, so be ready!

    The best weather conditions for sight fishing these blue hunters are sunny days with good light and slight to moderate wind. Water quality is crucial as bluefin prefer cool, clear water; another reason for them being seen during the cold pushing tide.

    Making the catch

    "A stunning setting for a breathtaking experience. It was everything that I hoped for." - James Lowe

    Photos of the bluefin trevally caught on a fly

    A picture tells a thousand words. See what these say about bluefin trevallies caught with Alphonse Fishing Co™.
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    Past bluefin trevally catches

    Once the fish swims away and your adrenaline stops pumping, you'll be left with a great memory and hopefully a fantastic photo.

    Read more about where to catch the bluefin trevally here Read more


    We choose destinations that meet our anglers’ needs and desires. You can focus on one atoll or combine several for a richer and more varied experience.
    • Alphonse Atoll

      Alphonse Atoll

      A dream destination for any fly fisherman, Alphonse Atoll in Seychelles is renowned for its expansive sea flats, which provide easy wading and world-class fly fishing.  The atolls are regarded as some of the most pristine, untouched islands in the world yet Alphonse Atoll is just a 60-minute flight from Mahé.

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    • Cosmoledo Atoll

      Cosmoledo Atoll

      Cosmoledo Atoll is just a stone’s throw away from the world heritage site of Aldabra, often referred to as the Galapagos of the Indian Ocean.

      Its ecosystem is pristine with saltwater flats and a huge variety of fish species, attracting fly fishermen from around the world. It is home to an eco-camp, dedicated to the atoll’s conservation.

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    • Astove Atoll

      Astove Atoll

      The home of the biggest giant trevallies in the Indian Ocean, this island in the Seychelles offers superb fly fishing in a shallow lagoon surrounded by sheer drop-offs. Just over a thousand kilometres from Mahe, this atoll forms part of the remote Aldabra group of atolls. Uninhabited since 1969, this atoll has seen very little human presence which makes for a wild and unique experience.

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    • Farquhar Atoll

      Farquhar Atoll

      Farquhar Atoll is the most southerly atoll in the Seychelles chain of islands lying just over 700km to the southwest of the main island Mahe. This remote atoll has a total area, including the large lagoon, of 170.5 km² which is 18 km north to south and 9 km east to west.

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    Turn your fly into a fish’s ultimate temptation. The Seychelles, with its 115 islands and deserted atolls, ideal weather and warm Indian Ocean waters, is renowned for being home to some of the world’s richest fishing grounds. You don’t even have to venture too far to break fishing records!

    Unique experiences like nowhere else


    • Home of the world's best fly fishing
    • Unique, bespoke trips to suit your needs
    • Located in the pristine remote outer islands of the Seychelles
    • Luxury accommodation and exquisite food
    • Unrivalled professional guides
    • Some of the richest fishing grounds in the world
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    Latest Blog Posts

    Read what our expert guides have to say or what fish our guests have been catching
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    Let us craft the ultimate bluefin trevally fly fishing experiences for you Enquire Now