Wahoo
Pelagic / OffshoreThe fastest fish in WA's bluewater — a sleek, striped, razor-toothed pelagic capable of explosive speed and reel-screaming runs. Found in warm offshore waters from Rottnest northward, with Rottnest Island marking the southern edge, and most common around the Gascoyne, Pilbara and Kimberley reefs, FADs and current lines. A summer FAD-and-troll target out of Perth and a prized capture for its blistering fight and excellent eating.
Overview
Wahoo are the speed merchants of WA's offshore scene — long, slim, vividly barred pelagics that hit a trolled lure and dump 100m of line before you've registered the strike. They favour warm, deep oceanic water and structure that holds bait: outer reef edges, current lines, floating debris and Fish Aggregation Devices (FADs). In WA they range from the tropical north — Exmouth, Ningaloo, the Mackerel and Montebello Islands, the Pilbara and Kimberley — down to Rottnest Island, which marks the southern extremity. Off Perth they're a summer prospect around the FADs deployed west of Rottnest in deep water, where they're taken both by trolling and by spearfishers working the floats. Up north they're a year-round bluewater target, often hooked while chasing mackerel and tuna.
Identification
'Hoo, ono
Long, slim and round in section, with an iridescent blue-green back, silver flanks and 20-plus vertical cobalt bars that run right down past the lateral line. The head is the giveaway: a long, pointed, beak-like snout with a mobile upper jaw and a mouthful of razor blades, quite unlike anything else in the spread. Narrow-barred Spanish mackerel is the usual mix-up — it has a shorter, blunter snout, fewer and vaguer grey bars that fade with age, and a deeper body. Wahoo also fold the first dorsal flat into a groove when running, which they do a great deal of.
How to Catch
Rigged whole gar or pilchard on a wire gang, swimming mullet, slimy mackerel, live skipjack or yakka
High-speed skirted trolling lures, deep-diving minnows (Halco Laser Pro 190), bibless vibes, large metal slugs, chrome bullets
Wire trace is essential — 60–100lb single-strand, 40–60cm, to a strong single hook or stinger treble, run under a heavy mono leader. For trolled lures, a short wire bite tippet. Use quality ball-bearing swivels — wahoo spin on the strike. Drag set firm but with line to give; the first run is savage and a locked drag pops leaders.
Troll skirts and deep-divers fast — 8–12 knots — along outer reef edges, current lines and around FADs and floating debris, watching the sounder and the surface for bait and birds. Wahoo strike hard and run fast, so keep rods in holders with a sensible strike drag and clear the deck on hook-up. When fish are holding around a FAD, slow-troll live baits or cast metals and bibless vibes into the structure. They often travel in loose packs, so a hook-up can mean multiples — have a second lure ready.
Off Perth, December through April when the FADs are out and the Leeuwin Current pushes warm water down past Rottnest. In the tropical north they're available year-round, best on the run-out tide along the outer reefs. Early morning and the change of light produce most quality fish; bright, calm days around current lines are prime.
Up to 80kg+, commonly 15–30kg in WA
Dec–Apr (Perth FADs); year-round in the tropical north
Size & Growth
Wahoo grow fast and do not live long, which is why decent fish turn up so readily. Off Perth, FAD and Rottnest-edge fish are commonly 8–20 kg; up north 15–30 kg is the standard and anything over 35 kg is a very good capture. The headline maximum runs past 80 kg, but that is a fish from the deep tropics, not something a Rottnest troll is going to produce. They put on weight quickly in their first couple of years — a metre-plus wahoo can be a young animal — and that growth rate is part of why the fishery holds up under trolling pressure.
Diet & Habitat
Wahoo are open-water hunters that eat squid, flying fish, scad, small tuna and anything else that schools in blue water. They hold where structure meets current — outer reef drop-offs, shelf edges, temperature and colour lines, floating debris and Fish Aggregation Devices — usually in the top 30 m rather than deep. In WA they follow the warm water: year-round through the Kimberley, Pilbara, Ningaloo and the Gascoyne, then down the west coast on the Leeuwin Current in summer as far as Rottnest, which is about the southern limit for a realistic shot at one. They travel in loose packs, so a strike often means more.
WA Size & Bag Limits
| Minimum size | 90 cm |
|---|---|
| Bag limit | 3 (the shared large pelagic finfish limit) |
| Counts toward | Counts within the statewide mixed daily bag limit of 3 for large pelagic finfish, shared with mackerel, tuna, cobia and barracuda. |
Wahoo fall within the statewide mixed daily bag limit of 3 for large pelagic finfish (shared with mackerel, tuna, cobia and barracuda). Minimum size: 90cm. Possession limit applies.
Eating Quality
Yes — among the best eating pelagics in WA. The flesh is very white, fine-grained and mild with almost no oil, superb as sashimi within hours of capture or as thick steaks seared and served rare. That leanness is also the trap: cook wahoo all the way through and it turns dry and chalky, so treat it like a good piece of beef rather than a fish fillet. Bleed it and get it into an ice slurry immediately — the flesh is soft, oxidises fast and does not tolerate a warm deck. It freezes better than most pelagics if you portion the loins, vacuum-seal them and use them within a few months. Large tropical fish carry a small ciguatera risk, which is another reason locals favour mid-sized wahoo for the table.
Perth Tips
The Perth FADs west of Rottnest are the accessible summer option for metro anglers; up north, the outer Ningaloo and Pilbara reefs and the Mackerel and Montebello Islands are the grounds. Run quality wire and check it for kinks after every fish — a kinked single-strand is a bite-off waiting to happen. Wahoo come in fast and green, so wear a green fish out properly before gaffing it boat-side.