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Dolphinfish (Mahi Mahi)

Coryphaena hippurus

Dolphinfish are one of Australia’s most exciting bluewater sportfish. Renowned for their brilliant colours, aerial displays and aggressive feeding behaviour, they inhabit warm tropical and subtropical waters around much of northern and eastern Australia.
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QUICK FACTS

Alternative Names

Mahi Mahi, Dorado.

Average Size

5 – 15 kg

Trophy Size

Primary Habitat

Deepwater

Depth Range

0--85

Taste Quality

DISTRIBUTION & HABITAT

COMING SOON

Queensland: Entire coastline, particularly around offshore reefs, current systems and Fish Aggregating Devices (FADs). New South Wales: Offshore current systems, continental shelf waters and FAD networks. Western Australia (north): Kimberley, Pilbara and Ningaloo regions. Northern Territory: Offshore reef systems, current lines and bluewater environments. Coral Sea: Offshore reefs, banks, floating structure and current convergence zones.

STATES

NSWQLDWANT

HABITAT

offshore-reefpinnacleopen-oceancurrent-linetemperature-breakfadcontinental-shelf
Dolphinfish are open-water hunters that use floating structure as shelter, feeding stations and ambush points. High-percentage locations include Fish Aggregating Devices (FADs), floating debris, drift lines, offshore reefs, pinnacles, current edges and temperature breaks. They are strongly attracted to anything floating. If offshore structure is holding bait, there is a good chance dolphinfish are nearby. Floating logs, navigation buoys, weed lines and pressure zones between water masses can all hold fish for extended periods.

SEASONAL PATTERNS

COMING SOON

SEASONAL NOTES

  • Dolphinfish movements are heavily influenced by warm currents and seasonal water temperatures.
  • Queensland generally fishes best from spring through autumn, with peak activity during summer.
  • New South Wales experiences its strongest fishing from late spring through autumn.
  • Northern Western Australia is most productive during the dry season through summer, while stable dry-season conditions often produce the best fishing in the Northern Territory.
  • Warm-water years frequently produce exceptional fishing, while larger fish commonly arrive later in the season.
  • Juvenile fish often school around FADs and isolated floating objects, which may hold fish for extended periods.

BEST BAITS

pilchardsquidgarfishlive-yellowtail-scadlive-slimy-mackereltuna-strip
  • Dolphinfish are opportunistic feeders and generally less selective than many other offshore pelagic species.
  • Live bait is particularly effective and can be difficult for larger fish to ignore.
  • Matching local bait size often improves results, while fresh bait consistently outperforms old frozen offerings.
  • Active presentation frequently matters more than scent alone.
  • Once a fish is hooked, additional fish commonly remain around the boat.

BEST BERLEY

pilchard-cubesfish-framesfish-cubestuna-cubes
  • Berley can be extremely effective when fishing around FADs, weed lines and floating structure.
  • Once dolphinfish appear behind the boat, a steady stream of small bait pieces can keep entire schools interested for extended periods.
  • Consistent feeding often encourages fish to remain near the vessel and creates opportunities for multiple captures from the same school.

BEST LURES

soft-plasticsurface-popperstickbaitskirted-lure
  • Dolphinfish are among Australia’s most lure-friendly gamefish.
  • Lures are particularly effective when searching large offshore areas, fishing around FADs and weed lines, targeting active bait schools or working surface-feeding fish.
  • Fast, erratic retrieves, aggressive sweeps, surface disturbance and high-speed trolling presentations all produce results.
  • As highly visual predators, dolphinfish often attack lures within sight of the boat.

WEATHER & TIDES

WEATHER CONDITIONS

  • Dolphinfish thrive in warm, clean blue water and are strongly influenced by ocean currents, bait availability and floating structure.
  • Water temperatures above 22°C generally produce the most consistent fishing, particularly where warm currents create defined temperature breaks and current lines.
  • Visible bait activity is one of the strongest indicators of fish presence. Flying fish, pilchards, slimy mackerel and other pelagic bait species commonly attract feeding dolphinfish.
  • Bird activity offshore often signals active bait schools and should never be ignored.
  • Productive conditions typically combine current movement, floating structure and concentrated bait. Fish Aggregating Devices (FADs), weed lines, navigation buoys and floating debris become significantly more productive when current is pushing bait past them.
  • Periods immediately following weather changes can also trigger aggressive feeding behaviour, particularly when ocean conditions stabilise and bait becomes concentrated around offshore structure.

TIDES

  • Unlike estuary species, dolphinfish are influenced less by traditional tidal phases and more by the current movement created by tides and offshore ocean systems.
  • Moving water is almost always preferable to slack conditions. Current flow concentrates bait around FADs, weed lines, floating debris and offshore structure, creating predictable feeding opportunities.
  • Tide changes can trigger increased bait activity, particularly around offshore reefs, pinnacles and pressure edges where currents converge.
  • Areas where tidal movement pushes bait against floating structure often hold the highest concentrations of fish. Similarly, weed lines and debris fields become far more productive when current is actively flowing along them.
  • Many experienced mahi mahi anglers focus less on whether the tide is rising or falling and more on whether water movement is present. Clean, moving water carrying bait through productive offshore structure consistently outperforms stagnant conditions.

AVOID

  • Green or dirty water
  • Cold-water intrusions
  • Dead current conditions
  • Structure with no bait present

IMPORTANT TIP

Many offshore anglers pass directly over dolphinfish because they fail to inspect floating objects closely.

COMPLETE FISHING GUIDE

TACKLE AND RIGS

Dolphinfish are among the most exciting sportfish available to Australian offshore anglers. Their speed, aerial displays and relentless direction changes make them formidable opponents on appropriately balanced tackle. Unlike species that rely primarily on brute force, mahi mahi fight with pace, athleticism and unpredictability, often producing spectacular jumps throughout the battle.

For most Australian conditions, rods between 6 and 8 feet rated for 10–24kg line classes provide an ideal combination of casting performance, lifting power and fish-fighting control. Reels in the 5000–10000 size range matched with 20–50lb braid offer more than enough capability for the majority of fish encountered around FADs, weed lines and floating structure.

Leaders between 40–80lb fluorocarbon provide abrasion resistance while maintaining presentation quality. Terminal tackle should be strong and reliable, with circle hooks and quality live-bait hooks accounting for the majority of successful captures. Heavy-duty swivels are commonly used, while wire traces are rarely necessary.

Popular rig options include unweighted live-bait rigs, slow-trolled live baits, pilchard drift rigs and surface skip-bait presentations. While heavy tackle certainly has a place when exceptionally large fish are expected, many anglers find lighter outfits provide a far more enjoyable sporting experience.

WHEN TO USE LURES

Dolphinfish are one of Australia’s most lure-responsive gamefish and frequently attack artificial presentations with little hesitation.

Lures are particularly effective when searching large areas of offshore water, investigating FADs and weed lines, targeting surface-feeding fish or working active bait schools. Their aggressive feeding behaviour makes them ideal candidates for both casting and trolling techniques.

Small skirted trolling lures, stickbaits, surface poppers, metal slugs, soft plastics and diving minnows all produce excellent results when matched to prevailing baitfish.

Fast, erratic retrieves often trigger aggressive reaction strikes, while surface disturbance and sudden directional changes can provoke spectacular visual attacks. High-speed trolling presentations are also highly effective when covering water and locating active fish.

Because mahi mahi are strongly visual predators, many strikes occur within sight of the boat, adding to their appeal as a premier sportfishing species.

TIME OF DAY

Dawn and early morning periods often produce the most consistent fishing, particularly when offshore bait activity coincides with favourable current movement.

Unlike many pelagic species, dolphinfish commonly remain active throughout the day and frequently feed aggressively under bright sunlight. Productive fishing can occur whenever active fish are present around floating structure, current lines or bait concentrations.

Overcast conditions often extend feeding activity and may create productive bite windows throughout the day.

Rather than focusing solely on the clock, successful anglers place greater emphasis on water quality, bait presence and floating structure.

COMMON MISTAKES

One of the most common mistakes made by offshore anglers is failing to inspect floating objects thoroughly. Weed lines, buoys, logs and other debris often appear insignificant at first glance but may hold substantial numbers of fish.

Many anglers also troll too far from FADs and fail to properly investigate the surrounding structure. Similarly, leaving an area immediately after landing a fish can result in missed opportunities, as entire schools frequently remain beneath the boat.

Fishing cold or dirty water significantly reduces the likelihood of encountering mahi mahi, while excessively heavy tackle often reduces the sporting qualities that make the species so popular.

Another common oversight is failing to carry live bait. While lures are highly effective, live bait can prove invaluable when fish become cautious or remain tightly associated with structure.

THE BOTTOM LINE

Successful dolphinfish fishing is built around four simple ingredients: warm blue water, current, floating structure and bait.

Whenever these elements come together, the chances of encountering mahi mahi increase dramatically. Every FAD, buoy, weed line and floating log should be treated as a potential hotspot and investigated thoroughly.

Consistent anglers cover water efficiently, remain observant and pay close attention to signs of life around offshore structure. When conditions align, few Australian gamefish offer a combination of accessibility, aggression and spectacle equal to that of the dolphinfish.

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