Spanish Mackerel
Pelagic / Reef edgeSpanish mackerel are the headline pelagic of WA's Gascoyne and North Coast — fast, razor-toothed fish trolled along the outer reefs from Shark Bay through Exmouth, the Pilbara and Kimberley.
Overview
Spanish mackerel are the headline pelagic of WA's tropical north, holding on the bommies and current lines from Shark Bay up through Exmouth, Onslow, Dampier and Broome. They follow bait — pilchard, mullet, fusilier — and tend to stack up on the same productive marks year after year. Most WA recreational catches come from boats trolling the outer reefs of Ningaloo and the Pilbara, though land-based spots like Tantabiddi and Steep Point produce fish on the right tides. The fishery has had stock issues over the last decade and the bag limit is now tight, so most anglers fish for one good fish rather than a feed.
Identification
Spaniard, narrow-barred Spanish mackerel
Long, steel-blue over silver, with wavy vertical grey bars that break up and fade as the fish gets bigger, and a mouth of fine, razor-sharp triangular teeth. The diagnostic is the lateral line: on a Spaniard it drops abruptly downward beneath the second dorsal fin. Shark mackerel have two lateral lines, a huge eye and an ammonia smell. Spotted mackerel carry round dark spots instead of bars and stay much smaller. Grey mackerel are blotchy and lack the sharp lateral-line drop. Wahoo look similar at a glance but have a longer, beakier snout and a long, low dorsal running most of the back.
How to Catch
Whole gar on a wire-trace gang, slimy mackerel, fresh pilchards, live yakka or mulie
Halco Laser Pro 190, deep-diving hard-bodies, Halco Twisty 30–60g, large skirted trolling lures, slow-pitch jigs
Wire trace is non-negotiable — 60–80lb single-strand or 7-strand, 40–60cm, run to a 6/0–8/0 single hook plus a stinger treble for trolled baits. For lures, a short wire bite tippet under a 60–80lb mono leader. Single-hook setups for live baits, gang hooks for whole pilchards or gar.
Troll skirts and deep-divers along the outer reef line at 6–8 knots, looking for bait shows on the sounder and bird activity above. When fish are holding on a particular bommie, switch to drifting live baits or slow-pitch jigs. They often follow a hooked fish to the boat, so have a second rod ready with a pitch bait. Land-based, cast metals into the current sweep at high tide. Keep retrieves fast — Spanish run down their prey.
Spring through autumn is prime in the Gascoyne, with September–November and again March–April standout months. Run-out tides on the outer reefs concentrate bait. Early morning and the last hour of light produce most quality fish; bright midday sun pushes them deeper.
Up to 30kg, commonly 6–15kg
Sep–Apr (Gascoyne/Pilbara peak)
Size & Growth
The 90 cm minimum equates to roughly a 5–6 kg fish, so undersized Spaniards are a real possibility rather than a technicality. Most WA fish trolled off Exmouth and the Pilbara are 8–15 kg. A good one is 15–20 kg and a genuine trophy is north of 25 kg; 30 kg is the headline figure and rare. They grow fast — legal size arrives within a couple of years — and females get considerably bigger than males, so the big fish are almost always breeding females. That, plus a decade of stock concerns, is why the bag limit is as tight as it is.
Diet & Habitat
Spaniards run down pilchards, fusiliers, mullet, garfish and squid, slashing through a bait school and turning back to pick up the pieces. They hold on outer reef edges, bommies, shoals, headlands and current lines, usually in 10–50 m, and they stack up on the same productive marks year after year. This is a Gascoyne and North Coast fish: Shark Bay north through Ningaloo, Onslow, Dampier and the Kimberley. They are not a Perth species — the odd fish reaches the Abrolhos in a strong Leeuwin Current summer, but nobody plans a metro trip around it.
WA Size & Bag Limits
| Minimum size | 90 cm |
|---|---|
| Bag limit | 3 |
| Counts toward | Counts within the large pelagic finfish mixed daily bag of 3 — a full bag can be three Spanish mackerel, or a mix such as two Spanish and one mahi mahi. |
Bag limit: up to 3, counted within the large pelagic finfish TOTAL mixed bag of 3 per fisher (a legal day can be three Spanish mackerel, or a mix such as two Spanish mackerel and one mahi mahi). Minimum size: 900mm. Possession limit applies.
Eating Quality
Yes — Spanish mackerel is excellent eating, provided it is bled and iced the moment it comes over the gunwale; the flesh oxidises fast in tropical heat and a poorly handled fish goes soft, grey and strong. Handled well you get firm, dense, pink-grey flesh that cooks up white and cuts naturally into steaks and cutlets. Grill or barbecue the steaks hot and fast, hot-smoke the belly flaps, or take sashimi off a very fresh fish. It carries a curry better than most. Mid-sized fish eat better than trophies, which run stronger and drier. Larger Spanish from northern waters carry a small but genuine ciguatera risk, so locals tend to keep the mid-sized ones. It freezes acceptably vac-sealed, though the flavour turns strong within a couple of months.
Perth Tips
Tantabiddi, the Muiron Islands, the Mackerel Islands off Onslow and the Montebellos all produce good fish in season. Most charters out of Exmouth target Spanish on a half-day trolling trip. Common rookie mistakes are running mono leader (one bite-off and the lesson is learned), and gaffing a green fish boat-side — wear them out properly first.