Sand Flathead
Sand flathead are the most commonly caught recreational fish in Tasmania and a staple of southern Australian estuaries from New South Wales around to South Australia and into Western Australia.
Flat, bottom-hugging, and built for ambush, they're a go-to target for lure and bait anglers working shallow bays and tidal drains — and one of the best eating fish in the country.
Scientific Name: Platycephalus bassensis
Also known as Common flathead, slimy flathead, bay flathead, sandy flathead, sandy, yanks, flatties
- Long, narrow body with a broad, strongly flattened head — the head makes up nearly a third of total body length.
- Sandy brown to pale mottled colouring above with small light and dark spots, 2–3 indistinct dark bands toward the tail, and a white belly.
- Distinctive large black blotch on the lower half of the tail fin — a key ID feature that separates it from tiger flathead, which has no dark tail markings.
- Two strong spines at the gill cover corner; the lower spine is noticeably longer than the upper — opposite to bluespotted flathead, where the spines are similar length. Typical fish run 30–45 cm; Port Phillip Bay fish tend to run smaller than Bass Strait or Tasmanian fish.
What to know
Habitat Distribution
- Endemic to Australia — native to temperate southern waters from central New South Wales, around Tasmania, through South Australia, and into southern Western Australia as far as Bremer Bay.
- Lives on sandy, muddy, or shelly bottoms in bays, inlets, and estuaries, from the shallows down to around 100 m, though most recreational fishing happens in water under 10 m.
- Tasmanian waters — particularly the Derwent estuary and south-eastern bays — have historically held the densest recreational populations, though the south-eastern stock is now severely depleted and closed to fishing.
- Victorian stocks include Port Phillip Bay (recovering) and other coastal waters including Corner Inlet and Bass Strait inshore areas (sustainable).
Key Locations
- Port Phillip Bay, Victoria — a major recreational fishery, though the stock is still in recovery; fish tend to run smaller than elsewhere.
- Corner Inlet and Bass Strait inshore waters, Victoria — sustainable stocks and good access for boat anglers.
- Tasmanian estuaries including the Derwent River and northern and western bays — historically the most popular flathead fishery in the country, now under strict management; check current zone rules before fishing.
- South Australian gulfs and inlets — present but stocks are poorly defined; low catch pressure.
Specific Spots
- Drop-offs and depth changes on the edge of tidal flats — flathead sit at the bottom of the slope waiting for bait swept off the flat by the falling tide.
- Mouths of drains and channels that funnel water off the flats on the run-out; these concentrate prawns and small fish, and flathead stack up accordingly.
- Weed edges and sand points that create current eddies — any structure that breaks flow and gives a fish a low-energy spot to hold while bait drifts past.
- Shallow sand and mud banks near mangroves or rock bars, especially where baitfish are visibly flicking on the surface.
Sand Flathead FAQ
Answers from onWater's species guide.
What are the best lures and bait for Sand Flathead?
Soft plastic paddle tails and curl tails (3–5 inch) on 1/8–1/4 oz jig heads are the standard lure, work them slowly along the bottom with short hops, keeping contact with the substrate where the fish are sitting.
When is the best time to fish for Sand Flathead?
Fishable year-round where open, but spring and early summer (September–December) see increased activity as water warms and fish move onto shallower flats. Autumn (March–May) can produce well as flathead feed up before cooler months; tidal movement matters more than season for day-to-day success.
How do you catch Sand Flathead?
Most anglers work shallow estuarine flats and tidal drains from a small boat or kayak, drifting with the tide and casting soft plastics or bait ahead of the drift. Land-based fishing from jetties, rock bars, and estuary banks is also productive, particularly around drain mouths on the run-out tide.
What do Sand Flathead eat?
Prawns and small baitfish make up the bulk of the diet, soft plastic lures in prawn or baitfish profiles (3–5 inch paddle tails or curl tails on a light jig head) are the most direct imitation and the go-to lure for most estuary anglers.
Where do Sand Flathead live?
Endemic to Australia, native to temperate southern waters from central New South Wales, around Tasmania, through South Australia, and into southern Western Australia as far as Bremer Bay.
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