Caranx ignobilis
Encounter Rate
Spotting Difficulty
Best Season
Year-round
Depth Range
3-60 meters
The giant trevally, known locally as the GT, is one of the most powerful and impressive predatory fish found in Komodo National Park. These muscular, deep-bodied fish can reach lengths exceeding 1.7 metres and weights of over 80 kilograms, making them formidable apex predators of the reef. In Komodo, giant trevallies are a common sight at current-swept sites where they hunt in the turbulent waters around exposed pinnacles and channel mouths. Their hunting style is explosive — they accelerate from a slow cruise to blinding speed in an instant to intercept prey. Divers at sites like Castle Rock and Batu Bolong frequently witness GTs attacking schools of fusiliers and surgeonfish in spectacular feeding rushes. They are also intelligent hunters known to shadow reef sharks and other predators, using the confusion created during an attack to pick off fleeing prey. Their silver-grey colouration darkens dramatically when they are excited or hunting, turning almost black.
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Average Size
0.6-1m
Size Range
0.4-1.7m
Maximum Size
1.7m, up to 80kg
Apex predator feeding on reef fish, cephalopods, and crustaceans. Hunts with explosive acceleration, targeting schools of fusiliers, surgeonfish, and other mid-water species in current-swept areas.
The giant trevally, known locally as the GT, is one of the most powerful and impressive predatory fish found in Komodo National Park. These muscular, deep-bodied fish can reach lengths exceeding 1.7 metres and weights of over 80 kilograms, making them formidable apex predators of the reef. In Komodo, giant trevallies are a common sight at current-swept sites where they hunt in the turbulent waters around exposed pinnacles and channel mouths. Their hunting style is explosive — they accelerate from a slow cruise to blinding speed in an instant to intercept prey. Divers at sites like Castle Rock and Batu Bolong frequently witness GTs attacking schools of fusiliers and surgeonfish in spectacular feeding rushes. They are also intelligent hunters known to shadow reef sharks and other predators, using the confusion created during an attack to pick off fleeing prey. Their silver-grey colouration darkens dramatically when they are excited or hunting, turning almost black.
This species plays an important role in the marine ecosystem of Komodo National Park. Responsible diving practices help protect these animals and their habitat for future generations.
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Komodo is home to some impressively large GTs. Individuals exceeding one metre are common at current-swept sites, and specimens approaching 1.5 metres are seen regularly at Castle Rock and Crystal Rock.
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