How to Catch Murray Cod: Australia's Freshwater Giant

Quick Answer

Murray cod are ambush predators that live tight against timber, so the single most important rule is to put your lure or bait within inches of submerged snags, fallen trees, undercut banks, and rock bars — a cod that won't move two feet for a meal will inhale one that lands on its nose. They feed hardest in low light and warm water, which makes dusk into the first hour of dark, in water above roughly 18°C (64°F), the prime window — large spinnerbaits, big swimbaits, and surface lures shine then. Fish heavy: a baitcaster with 30–50 lb braid and a 40–60 lb leader so you can drag a hooked fish out of the timber before it buries you. There is a strict, legally enforced closed season over spring spawning (dates vary by state) plus minimum and maximum size limits — know them before you wet a line, and release the big breeding females that carry the population.

Know the Fish Before You Cast

Murray cod (Maccullochella peelii) are Australia's largest purely freshwater fish and an iconic apex predator of the Murray–Darling Basin.

• Genuinely huge and long-lived: They commonly reach 80–100 cm and can exceed a meter and 30+ kg. Big fish are decades old — a one-meter cod may be 20–30 years old, which is exactly why releasing them matters.
• Ambush, not pursuit: Cod hold station beside structure and explode on prey that passes close. They are not roamers chasing bait across open water; they wait. This dictates everything about how you fish for them.
• Opportunistic carnivores: They eat fish, yabbies, shrimp, frogs, ducklings, water rats — almost anything that fits the bucket-sized mouth. That broad diet is why big, noisy, profile-heavy lures work.
• Territorial and structure-bound: A productive snag often holds a fish year after year. Learn to read where they sit and you'll catch them repeatedly.

Timing: Season, Time of Day, and Water Temperature

Cod activity is driven by water temperature and light, and your calendar is partly set by law.

• Open season is the warm months: Fishing is closed over the spring spawning period (commonly around Sep 1 – Nov 30, but the exact dates differ by state and water — confirm locally). The hottest fishing is typically late spring through autumn once the closure lifts.
• Water temp is the trigger: Cod metabolism and feeding climb as water warms past roughly 18°C (64°F) and stay strong into the low–mid 20s°C (70s°F). In cold winter water they still feed but slowly — work baits and lures dead-slow.
• Low light is gold: Dawn and especially dusk-into-dark are the standout windows. Many of the biggest fish, and nearly all the surface-lure action, come in the last light and after dark.
• Fish the weather: A warm, humid, overcast evening or the build-up before a summer storm can switch big cod on hard. Rising or freshly colored water after rain often sparks aggression near inflows.

Where They Live and How to Read Structure

Find the timber and current seams and you've found the cod. In rivers, read flow; in impoundments, find the drowned forest.

• Snags are everything: Submerged logs, fallen trees, root balls, and laydowns are prime real estate. Target the down-current side and any ambush pocket where a fish can sit out of the main flow and pounce.
• Rock bars and ledges: Rocky outcrops, bridge pylons, and rubble create current breaks and hold fish, especially where they meet deeper water.
• Current seams and eddies: In flowing rivers, cod sit just out of the main current in the slack water beside it, facing up-flow to grab whatever the current delivers.
• Impoundment timber and points: In dams (Copeton, Mulwala, Blowering, Burrinjuck and similar), look for standing dead timber, submerged creek beds, rocky points, and steep banks. Cod relate to the old river channel.
• Depth varies with season: Shallow margins and snags in warmer months and low light; deeper structure during the heat of the day or cold water.

Best Baits

Bait fishing is deadly for cod, particularly at night, fished hard against structure.

• Bardi grubs: The classic, near-legendary cod bait. These large beetle larvae are tough, oily, and irresistible. Hook them once through the head so they stay lively.
• Yabbies and shrimp: Live yabbies (freshwater crayfish) and shrimp are excellent. Hook a yabby through the tail so it swims naturally; bigger yabbies sort the bigger fish.
• Live and cut bait fish: Where legal, a live or freshly cut bait fish presents a big, natural profile. Always check which species are legal to use as bait in your water — never use noxious or protected species.
• Cheese and worms: A lump of tasty cheese (the strong, smelly kind) and big bunches of scrub worms both produce, and they stay on the hook well for long soaks.
• Presentation: Use a running-sinker rig with the weight matched to the current, cast tight to the snag, keep a tight-ish line, and be ready — a cod often picks up and turns straight back into cover.

Best Lures

Cod lures are big, push water, and get bites by getting close. Go large and confident.

• Spinnerbaits: A go-to for snag-bashing. Heavy ½–1 oz+ spinnerbaits with big Colorado/willow blades thump water and come through timber relatively snag-free. Slow-roll them right past the wood.
• Swimbaits and big hard-bodies: Large jointed swimbaits and deep/medium-diving hard-bodied lures in the 100–200 mm range (and bigger) imitate a substantial meal. Bang them off structure and pause.
• Surface lures at dusk: Big paddlers, "cicada"/wakebaits, and large poppers worked across the surface in the evening and after dark draw heart-stopping boofing strikes. Steady, rhythmic retrieves with pauses near snags.
• Soft plastics and spinnerbait combos: Big paddle-tail and curl-tail plastics on heavy jig heads, fished slow along structure, are excellent in colder water when fish are sluggish.
• Color and action: Dark profiles (purple, black, dark green) for low light and dirty water; natural and gold tones in clear water. The constant is a strong, water-displacing action.

Gear: Rod, Reel, Line, Leader, and Hooks

This is heavy-cover fishing for a powerful fish — undergun it and you'll lose the fish of the trip in the timber.

• Rod: A baitcasting rod rated roughly 6–15 kg (medium-heavy to heavy), 6'–7', with backbone to turn a fish out of structure but a tip that loads big lures.
• Reel: A robust low-profile baitcaster (or a stout spin reel) with a strong, smooth drag and enough line capacity for braid plus a heavy leader.
• Line: 30–50 lb braid for casting lures (low stretch for instant hook-sets and lifting power); many bait anglers run heavy braid or 30–50 lb mono for soaks.
• Leader: 40–60 lb (or heavier near gnarly timber) fluorocarbon or mono leader to survive abrasion against logs and rock.
• Hooks: Strong, chemically sharpened single hooks for bait (sized to the bait — large for grubs and yabbies). On lures, upgrade factory trebles to heavy-gauge and consider replacing trebles with strong singles where regulations or release ethics call for it.

Hooking, Fighting, and Landing

Everything happens fast and close to cover, so the fight is won in the first few seconds.

• Strike hard, immediately: When a cod hits, set the hook firmly and start cranking at once. Hesitate and the fish dives back into the snag.
• Turn its head: Apply heavy, low pressure to pull the fish away from structure. Lead it toward open water before it gets into the worst of the timber.
• Don't give line into cover: With locked-up drag and heavy gear, the goal is to dictate the fight, not let a big fish dump you into the logs.
• Land it safely: Use a large, knotless rubber-mesh net to protect the fish's slime, jaw, and fins. Support big fish horizontally with two hands — never hang a heavy cod vertically by the jaw, which can damage it.

Regulations and Release Ethics

Murray cod are managed tightly because they're slow-growing and long-lived. Respect the rules — they exist for a reason, and they're enforced.

• Closed season: A statewide closed season protects spawning cod (commonly spring, roughly Sep–Nov). Dates and exceptions vary by state and water — check current NSW DPI, Victorian Fisheries Authority, SA, QLD, or ACT rules before you fish.
• Size and bag limits: There are minimum legal lengths, often a maximum/slot limit that protects big breeders, and small daily bag and possession limits. Confirm the exact numbers for your state — they change and differ between jurisdictions.
• Release the big ones: Large fish are old, prolific females. Best practice is to release any big cod regardless of legal limits to keep the fishery healthy.
• Handle for survival: Keep the fish wet, minimize air time, use wet hands or a rubber net, support the body horizontally, and revive it in the water — facing into gentle current — until it swims off strongly.
• Use cod-friendly tackle: Barbless or crushed-barb single hooks, knotless nets, and quick releases dramatically improve survival rates.