Mahi Mahi, also known as dolphinfish or dorado, are a vibrant, fast-growing pelagic species found in offshore Australian waters. Renowned for spectacular aerial displays and aggressive strikes, this guide covers trolling technique, tackle and locations for targeting mahi mahi around the Australian coastline.
Mahi Mahi favour warm offshore currents, current lines and floating structure such as weed lines, debris and Fish Aggregating Devices (FADs), where baitfish naturally congregate. Despite the common name, they are unrelated to marine mammals, with "mahi-mahi" derived from Hawaiian language to avoid confusion. Anglers chasing this species often encounter them while trolling for other offshore pelagics such as tuna and billfish.
This fast-growing, short-lived species typically reaches several kilograms within a single year, with school-sized fish common and larger "bull" specimens occasionally encountered around structure. Mahi Mahi are highly social, often appearing in numbers, which means hooking one fish can trigger a broader feeding response among the school. This behaviour is well suited to blue water fishing approaches targeting visible surface activity and floating debris.
FISHING TECHNIQUES
Trolling is the most effective and widely used technique for locating and catching Mahi Mahi, with small to medium skirted lures worked at a steady speed around weed lines, current edges and floating structure. Varying trolling speed and lure spread depth helps identify the most productive zone on any given day, and running a spread that includes a mix of skirted lures, diving plugs and squid imitations increases the chance of triggering a strike.
Once a school is located, casting brightly coloured lures or soft plastics directly at visible fish, followed by a fast, erratic retrieve, often produces immediate results. Live baiting with small baitfish suspended beneath a float along current lines is particularly effective during warmer months, while jigging can also account for fish once a school has been found, a technique also covered through lure fishing resources.
GEAR & EQUIPMENT
A medium to heavy spinning or baitcasting outfit with a fast action tip suits most Mahi Mahi fishing, paired with a reel offering high line capacity and a smooth, reliable drag system to handle powerful runs and aerial jumps. Outfits in the 10-15kg class are generally well matched to school-sized fish, with heavier tackle reserved for targeting larger bull specimens around structure.
Braided mainline in the 30-50lb range offers strength with minimal stretch, paired with a fluorocarbon or monofilament leader to absorb shock during the species' characteristic jumps. Circle hooks suit live bait presentations, while J-hooks remain standard for trolled lure setups. Anglers can review fishing line and fishing reels resources when assembling tackle suited to offshore pelagic species.
LOCATIONS & SPECIES
Mahi Mahi are found across offshore Australian waters, with strong seasonal activity typically occurring during the warmer months. Western Australia's Ningaloo Reef and Exmouth Gulf are noted for rich pelagic activity including Mahi Mahi, while east coast locations such as the Gold Coast also see consistent encounters from late spring through summer, often associated with bluefin tuna and black marlin grounds where mixed pelagic species are commonly targeted.
Government-deployed Fish Aggregating Devices (FADs) in several regions provide reliable, identifiable structure that attracts Mahi Mahi alongside other pelagic species, offering a useful starting point for anglers unfamiliar with a given stretch of offshore water. Anglers researching fishing marks and offshore GPS marks can often locate FAD positions and known current lines relevant to their region.
Mahi Mahi are subject to bag limits in some Australian jurisdictions, and anglers should confirm current regulations through their relevant state fisheries authority before heading offshore. Given their short lifespan and fast growth rate, Mahi Mahi populations generally recover quickly, though responsible harvest and adherence to local bag limits remain important to sustaining healthy offshore fisheries, with further detail available through bag limit resources.
Mahi Mahi biology is distinguished by remarkably rapid growth combined with a short overall lifespan, typically around four to five years. This life history allows populations to respond quickly to favourable conditions, with fish commonly reaching several kilograms within their first year of life. This combination of fast growth and a short generation time means Mahi Mahi populations are generally considered resilient to moderate fishing pressure compared with slower-growing offshore species, though local bag limits still apply in many regions to manage recreational catch.
The species' strong association with floating structure is a defining behavioural trait that anglers can use to their advantage. Weed lines, drifting debris, lobster pot floats and current edges all tend to concentrate the small baitfish that Mahi Mahi prey upon, making these features reliable starting points when searching open offshore water. Trolling along the edges of such structure, rather than directly over it, often produces the best results while avoiding gear entanglement.
As a table fish, Mahi Mahi are highly regarded, offering firm, white flesh suitable for a wide range of preparations and contributing significantly to their popularity among recreational anglers. Combined with their spectacular fighting characteristics, including powerful runs and repeated aerial jumps when hooked, Mahi Mahi represent one of the more rewarding offshore targets available to Australian anglers during the warmer months. Those planning an offshore trip can find further context through fishing tours and dolphinfish resources covering broader pelagic species and seasonal patterns relevant to mahi mahi fishing around the Australian coast.