How to catch Island trevally
Ferdauia orthogrammus (Jordan & Gilbert, 1882)
About Island trevally fishing
The island trevally is an offshore pelagic fish belonging to the jack family Carangidae, recognised by an oblong compressed body, an angular snout, brassy to greenish-blue upper flanks fading to silver, and distinctive yellow spots along the midline. Growing to a maximum recorded length of 75 cm and a weight of 6.61 kg, adults typically frequent oceanic island groups, reef systems, and deep sandy channels rather than continental shelves. They operate as active marine predators, moving in small schools or pairs to hunt small fishes and bottom-dwelling crustaceans across deep waters down to 168 metres. Because of their spirited fighting ability and presence around clear tropical drop-offs, they attract significant attention from light tackle and offshore sport anglers.
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Difficulty
Medium
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Average size
40 cm FL
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Market value
Medium
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Habitat
Saltwater
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Season
Spring, Summer, Autumn, Winter
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Also known as
Black-spotted jack, Blue trevally, False bluefin trevally, Island jack, Socorro jack, Thicklip trevally
Terminal mouth
The terminal mouth position helps distinguish this trevally species.
Distinct spots
Row of dark spots along the upper side identifies the species.
Island trevally fishing facts
Characteristics
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Typical size
40 cm FL (max 75 cm TL ) -
Typical weight
1.2 kg (max 6.6 kg ) -
Preferred temperature
23.7–29 °C -
Depth
0–168 m -
Body shape
Fusiform / Normal -
Commercial?
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Vulnerability score
39
Best hours
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Peak
Dawn
First light
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Peak
Morning
After sunrise
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Low
Midday
High sun
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Low
Afternoon
Late day
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Active
Dusk
Last light
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Low
Night
After dark
When to fish for Island trevally
How to catch Island trevally
Tips for catching Island trevally
Targeting island trevally requires focusing on offshore reef structures, current-swept channels, and drop-offs surrounding island environments where these pelagic predators patrol for prey. Anglers achieve the best results by casting surface stickbaits and poppers over shallow reef flats during early morning light, or by working metal jigs and weighted soft plastics near sandy bottoms where the fish forage for crustaceans and small fish. Because these jacks possess sharp eyesight and powerful acceleration in clear water, long casts and fast, erratic retrievals are essential to trigger a strike. Trolling deep-diving minnow lures along the edges of drop-offs also effectively locates roaming schools during mid-day periods.
Other names for Island trevally
Local and alternate names anglers use for Island trevally.
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Island trevally
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Island jack
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False bluefin trevally
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Yellowspotted jack
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Yellowspot trevally
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Trevally
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Yellow spotted trevally
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Thick-lip trevally
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Thicklip trevally
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Socorro jack
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Blue trevally
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Yellow-spotted trevally
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Black-spotted jack
Best equipment to catch Island trevally
Compare fishing methods for Island trevally — sized kit for each technique.
Note: Typical fish is 1.2 kg Our algorithm will suggest the best equipment for you based on this weight.
Spinning
Casting and retrieving lures with a spinning rod and reel.
85% Effectiveness
Rod
Spinning rod
A spinning rod is a fishing rod built to carry a spinning reel under the blank. You cast lures and light baits with it from shore or a boat.
Sized for a typical fish
light · 2.1 m
- Reel seat
- Spinning
- Form factor
- Multi-piece
- Action
- Fast
- Grip
- EVA
Reel
Spinning reel
A spinning reel hangs under the fishing rod and is the default reel for casting lures and light baits. Line peels off an open spool with a bail.
Sized for a typical fish
1000 · 3 kg drag · 185 g
- Spool
- Fixed
- Mount
- Under
- Drag
- Front
- Retrieve
- Manual
Line
Braided line
Braided fishing line is the thin, no-stretch main for long casts, jigging, and feeling every tick on the retrieve.
Sized for a typical fish
6 kg · 0.1 mm
- Visibility
- High
- Abrasion
- Low
- Stretch
- None
- Sink rate
- Floats
Leader
Fluorocarbon leader
A fluorocarbon leader is the clear, fast-sinking join between a visible main line and the lure or hook.
Sized for a typical fish
7 kg · 0.3 mm · 90 cm
- Visibility
- Very low
- Abrasion
- High
- Stretch
- Low
- Sink rate
- Fast
Popping
Working surface poppers or stickbaits for inshore and tropical predators.
80% Effectiveness
Rod
Offshore rod
An offshore rod is the one-piece boat fishing rod for deep jigging, trolling, and live bait in open salt water.
Sized for a typical fish
heavy · 1.68 m
- Reel seat
- Casting
- Form factor
- One-piece
- Action
- Fast
- Grip
- EVA
Reel
Spinning reel
A spinning reel hangs under the fishing rod and is the default reel for casting lures and light baits. Line peels off an open spool with a bail.
Sized for a typical fish
1000 · 3 kg drag · 185 g
- Spool
- Fixed
- Mount
- Under
- Drag
- Front
- Retrieve
- Manual
Line
Braided line
Braided fishing line is the thin, no-stretch main for long casts, jigging, and feeling every tick on the retrieve.
Sized for a typical fish
6 kg · 0.1 mm
- Visibility
- High
- Abrasion
- Low
- Stretch
- None
- Sink rate
- Floats
Leader
Fluorocarbon leader
A fluorocarbon leader is the clear, fast-sinking join between a visible main line and the lure or hook.
Sized for a typical fish
7 kg · 0.3 mm · 90 cm
- Visibility
- Very low
- Abrasion
- High
- Stretch
- Low
- Sink rate
- Fast
Jigging
Working vertical lures with an active up-and-down motion.
75% Effectiveness
Rod
Jigging rod
A jigging rod is the short, powerful fishing rod for working a metal jig up through the column, including freshwater jigging.
Sized for a typical fish
heavy · 1.52 m
- Reel seat
- Casting
- Form factor
- One-piece
- Action
- Fast
- Grip
- EVA
Reel
Jigging reel
A jigging reel is a compact, high-speed conventional for working metal jigs. A short retrieve picks up slack fast.
Sized for a typical fish
10 · 10 kg drag
- Spool
- Revolving
- Mount
- Over
- Drag
- Star
- Retrieve
- Manual
Line
Braided line
Braided fishing line is the thin, no-stretch main for long casts, jigging, and feeling every tick on the retrieve.
Sized for a typical fish
6 kg · 0.1 mm
- Visibility
- High
- Abrasion
- Low
- Stretch
- None
- Sink rate
- Floats
Leader
Fluorocarbon leader
A fluorocarbon leader is the clear, fast-sinking join between a visible main line and the lure or hook.
Sized for a typical fish
7 kg · 0.3 mm · 90 cm
- Visibility
- Very low
- Abrasion
- High
- Stretch
- Low
- Sink rate
- Fast
Trolling
Drawing lures or baits behind a moving boat.
70% Effectiveness
Rod
Trolling rod
A trolling rod is built to sit in a holder and pull a lure or bait at speed. Moderate action so the rod, not the reel, plays the fish.
Sized for a typical fish
medium · 1.83 m
- Reel seat
- Casting
- Form factor
- One-piece
- Action
- Moderate
- Grip
- EVA
Reel
Trolling reel
A trolling reel is the dedicated lever-drag fishing reel for pulling lures behind a boat, often in a holder all day.
Sized for a typical fish
20 · 15 kg drag
- Spool
- Revolving
- Mount
- Over
- Drag
- Lever
- Retrieve
- Manual
Line
Braided line
Braided fishing line is the thin, no-stretch main for long casts, jigging, and feeling every tick on the retrieve.
Sized for a typical fish
6 kg · 0.1 mm
- Visibility
- High
- Abrasion
- Low
- Stretch
- None
- Sink rate
- Floats
Leader
Fluorocarbon leader
A fluorocarbon leader is the clear, fast-sinking join between a visible main line and the lure or hook.
Sized for a typical fish
7 kg · 0.3 mm · 90 cm
- Visibility
- Very low
- Abrasion
- High
- Stretch
- Low
- Sink rate
- Fast
Best lures and baits for Island trevally
Ranked lures and natural baits from every method, best first.
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Metal jig
- Spinning
- Jigging
A long metal lure for speed-jigging the deep column.
How Island trevally migrates — Oceanodromous
Migrates within the sea between spawning, nursery and feeding grounds, and never enters fresh water. Follow its seasonal shifts along the coast and offshore.
1 Eggs
Spawning grounds
Laid on the spawning grounds.
2 Larvae
→ Nursery grounds
Drift with the currents to the nursery grounds.
3 Juveniles
Nursery grounds
Grow up in sheltered nursery waters.
4 Adults
Feeding grounds
Range widely over the feeding grounds.
5 Spawners
→ Spawning grounds
Return to the spawning grounds each season.
It stays in the sea and never runs up into fresh water.
Hover or tap a number to read each stage.
Diet and behavior of Island trevally
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Diet
Carnivore -
Feeds by
Hunts animals -
Hunts
Dawn · Morning -
Feeds over
Soft bottom · Seagrass · Coral reefs -
Main prey
Baitfish
Prey and predators of Island trevally
Prey is what Island trevally eats. Predators are the animals that eat it.
That is how it feeds, and how it is hunted.
Prey
What it eats
Where Island trevally lives
Tied to reefs and rocky structure in shallow coastal water.
0–168 m
Where this species lives
Island trevally photos for identification
Compare these photos with the catalog plate to identify the species.
Where to fish for Island trevally
Mapped fishing spots where Island trevally is recorded — open a pin for access and methods.
