Black Marlin Fishing in WA: An Honest Guide to the North

The whole fishery comes down to geography. At Exmouth, the continental shelf swings unusually close to the coast, which means deep, current-swept billfish water sits within a short run of the Tantabiddi boat ramp and the Bundegi ramp on the gulf side. Elsewhere in Australia, raising a marlin means a long, fuel-hungry steam to the shelf. At Exmouth it can mean thirty minutes and a small trailer boat.

That access has built a reputation. Exmouth raises everything from accessible light-tackle blacks to grander-class fish, and the cooler-month inshore run — smaller blacks schooling along the Ningaloo drop-off — has made it a genuine destination for anglers chasing world records on light line and fly. The Exmouth Game Fishing Club runs an active tag-and-release programme and the annual GAMEX tournament. Most boats in season are tagging multiple fish a trip, not landing them.

• Exmouth / Ningaloo — the headline. Light-tackle blacks school inshore off the reef in good numbers through the cooler months, roughly April to July, fishable from small boats out of Tantabiddi. Lighthouse Bay and the tip of the Cape are classic marks.
• Coral Bay — the southern end of Ningaloo, with the same shelf access on its day. Coral Bay charters run billfish trips in the warmer months.
• Broome and the Kimberley — produce black marlin over the warmer months and the wet-season build-up. Broome is the staging point for the far north.

The broad productive window across northern WA is October through April, with summer into early autumn the most consistent offshore, while the inshore Ningaloo light-tackle run peaks in the cooler months. Some fish hang on the shelf year-round. Run-out tides concentrate bait along the drop-off, and the change of light tends to fire — calm days with defined current lines make raising fish far easier.

Black marlin is one of the few recreational-only fish in Australian waters, and the entire culture around it is conservation-first. Legally, marlin sit within the statewide mixed daily bag limit for large pelagic finfish, with an individual species limit and no minimum size — but the number that matters in practice is zero retained. Clubs, charters and tournaments tag and release as standard, billfish handling rules apply, and larger tropical billfish also carry a ciguatera risk, so they’re not an eating fish here anyway.

Don’t take the bag and licence numbers off a forum or this article. Fishing for finfish from a powered boat requires a Recreational Fishing from Boat Licence (RFBL), and bag limits and licensing change. Read the current rules at DPIRD before you go. On a charter, the operator’s coverage applies — confirm it when you book.

You can do this fishery without owning a serious bluewater boat, and most people should. Exmouth and the surrounding coast support a strong charter fleet, including game-dedicated operators who run billfish trips through the season and crews holding line-class records.

• Tantabiddi-based charters — the shortest run to marlin water on Ningaloo’s western side. Best for the cooler-month light-tackle blacks.
• Bundegi / gulf-side charters — work the Exmouth Gulf and the eastern grounds, often combining billfish with sailfish and Spanish mackerel.
• Exmouth Game Fishing Club — the hub of the local tag-and-release effort and the GAMEX tournament; a good first point of contact for who’s fishing and how the season’s running.
• Broome operators — for anglers chasing the far-north fishery in the warmer months.

If you’d rather learn the craft properly, book a dedicated game charter rather than tacking a billfish onto a reef-fishing day. Raising and converting marlin is a specialist skill, and the crews who do it daily are worth every dollar.

Game tackle is the starting point: a 15–37kg overhead or a heavy stand-up spin outfit, 130–400lb mono or fluorocarbon leader, quality ball-bearing swivels, and a properly set drag — the first run is brutal. Circle hooks in 8/0–10/0 are the standard for bait and are mandatory under most tagging programmes; they hook in the jaw corner and lift release survival enormously. For lures, run medium-to-large skirted trolling lures, a Halco Laser Pro 190 or large bibless minnows. Exmouth’s smaller inshore blacks are what make the genuine light-tackle and fly fishery possible — but match the tackle to the fish honestly, because under-gunning a big fish just kills it slowly.

The classic method is to troll skirts and rigged swimming gar or mullet at 6–9 knots along the shelf edge, current lines and bait schools, watching for tailing fish, free-jumpers and working birds. The more visual game is switch-baiting: tow hookless teasers to raise a fish, then pitch a live bait or stickbait as it lights up in the spread. Let the fish turn and load the circle hook with a steady lift — don’t strike. Clear the deck on hook-up, because blacks jump early and often. Then release boat-side without lifting the fish from the water: leader it, tag it alongside, revive it, and let it swim off strong.