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29,821-acre Spencer Gulf. Sector 73 Australian saltwater fishing map showing only directly measured AusBathyTopo 2026 cells, source-qualified fishing spots, official regional fish evidence, seasonal forage context, access guidance and current-rule links. Sector 73 trip-scale surveyed footprint within Spencer Gulf. Australia's long western gulf, divided from upper tidal flats through major bays and channels to its offshore-facing mouth. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 125 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Below is the species-by-species picture, pulled from the same data the map uses.
Spencer Gulf - Sector 73 maps at 29,820 acres behind 29.1 miles of shoreline. Its 1.2 shoreline index means few bank features; the contours below do the pattern work. Littoral water — the productive band under ~15 ft — makes up 3% of this chart. Call it 9.7 mi long by 7.7 mi wide at the broadest reach. Its nearest charted neighbour, Spencer Gulf - Sector 66, is 12 mi to the north.
Regional occurrence does not mean equal abundance, child-specific catch rate, retention permission or a promised catch. Live state, territory, Commonwealth, protected-area and local rules always control. The roster may combine exact-water monitoring with habitat-filtered official regional evidence; it does not imply that every species is equally abundant throughout the mapped section.
| Species | Evidence basis | Count / date |
|---|---|---|
| sand flathead (Sand Flathead) | official species listing | — |
| gummy shark (Gummy Shark) | official species listing | — |
| mulloway (Mulloway) | official species listing | — |
Official species-evidence source.
Spring sand flathead on Spencer Gulf - Sector 73 hold shallow, usually 8 to 35 ft. They move out to 16 to 80 ft in summer and finish the year down in 8 to 35 ft. Put Sharp break first on the milk run — a drop-off near 88 ft that grades good for summer. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dawn & dusk | open water | see map |
| Summer | 16 to 80 ft | dawn & dusk | Sharp break (88 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | open water | see map |
| Winter | 8 to 35 ft | dawn | open water | see map |
The spring pattern is a shallow one: gummy shark in 8 to 40 ft. Midsummer fish sit out in 18 to 120 ft before dropping to 8 to 40 ft for winter. The spot to know is Sharp break, a drop-off in about 88 ft of water that rates prime for gummy shark in summer. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | open water | see map |
| Summer | 18 to 120 ft | dawn & dusk | Sharp break (88 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (88 ft) | see map |
| Winter | 8 to 40 ft | dawn | open water | see map |
Come spring, look for mulloway tight to the bank in 5 to 30 ft. They move out to 14 to 100 ft in summer and finish the year down in 18 to 100 ft. If you only fish one area, make it Sharp break: a drop-off around 88 ft that scores good in summer. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | open water | see map |
| Summer | 14 to 100 ft | dawn & dusk | Sharp break (88 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (88 ft) | see map |
| Winter | 18 to 100 ft | midday | Sharp break (88 ft) | see map |
The chart marks 5 structure features on Spencer Gulf - Sector 73; the deepest is Deepest basin at about 124 ft.
No facility from the cited South Australian boat ramps and marine facilities source was spatially attached within 3 km of this directly measured map footprint during the 2026-09-08 audit. This is an evidence gap, not a claim that public access is absent. Check the official portal, live site signs, tides, ramp condition, vessel suitability, fees, parking, working-port restrictions and landowner permissions before travel: https://www.sa.gov.au/topics/boating-and-marine/boat-ramps-and-marine-facilities
Private land and private launches need the owner's permission — please ask first.
Season dates, license requirements, and size and bag limits for South Australia waters are set by the PIRSA (current recreational species limits) — and special regulations can apply to Spencer Gulf - Sector 73 specifically, so confirm the current rules before you fish. Check PIRSA's live species lookup, closures and SA Fishing app before every trip. Snapper remains absent from these page rosters because the current management closure prohibits targeting and catch-and-release in the affected South Australian waters through the stated closure period. Verify all size, boat and possession limits, protected areas, gear controls and local access directions. A contour, spot or access lead never grants fishing, retention, entry, parking or launching permission.
Check the official South Australia fishing regulations →
PIRSA SA Fishing app and live rules →
Check special-area and water-specific rules →
Spencer Gulf - Sector 73 is about 125 ft (38 m) deep at its deepest point. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Official coastal monitoring from Primary Industries and Regions South Australia regional evidence informs the sand flathead, gummy shark, mulloway roster for Spencer Gulf - Sector 73. The mixed roster combines exact-water records where available with habitat-filtered regional evidence; not every species is documented at this exact water, and it is not a promise of equal abundance or a catch on a particular trip.
Sharp break is the top-rated area: a drop-off in about 88 ft of water that rates prime for gummy shark in summer. Every other rated spot, per species and season, is on the map above.
For sand flathead, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Spencer Gulf - Sector 73 is regulated by the PIRSA (current recreational species limits). Check the official South Australia regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Spencer Gulf - Sector 66 12 mi · Spencer Gulf - Sector 72 13 mi · Spencer Gulf - Sector 65 15 mi · Spencer Gulf - Sector 64 23 mi · Spencer Gulf - Sector 59 26 mi · Spencer Gulf - Sector 71 28 mi · Spencer Gulf - Sector 60 32 mi · Spencer Gulf - Sector 78 37 mi · Spencer Gulf - Sector 52 37 mi · Spencer Gulf - Sector 53 40 mi · Spencer Gulf - Sector 61 40 mi · Spencer Gulf - Sector 90 63 mi
Browse all South Australia fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.