Spanner Crab
Spanner Crab is a premium wild-caught crab species found in Queensland’s offshore waters and is well known for its sweet, delicate flesh and clean flavour. Unlike mud crabs, spanner crabs are a deep-water species and are typically landed live and also sold whole (raw or cooked) or as ready-to-use picked crab meat.
Queensland’s spanner crab fishery is one of the state’s most tightly managed fisheries and is recognised nationally for its strong sustainability credentials, reflecting effective fishery management, monitoring and harvest controls. Spanner crabs are an important species for Queensland fishing communities, particularly along the central and southern coast.
Quick Facts
Scientific name: Ranina ranina
Habitat: Offshore sandy and muddy seabeds
Depth range: Generally 20–200 metres
How they’re caught (Qld): Purpose-built spanner crab pots (known as dillies)
Fishery: Queensland Spanner Crab Fishery (C2)
Stock status: Reported as sustainable in national stock assessments
Eating Quality
Flavour
Sweet, mild and clean
Oiliness
Low
Moisture
Moist
Common Size
Males can grow to around 15cm and females to around 12cm (egg-bearing females are protected in Qld). This species has a minimum size limit of 10cm (measured from centre spine to mid carapace base)
Texture
Fine flaked and tender
Flesh Colour
White and opaque when cooked
Buying Tips
Look for clean shells and a fresh, mild aroma
Key Difference
Spanner crabs are naturally orange while alive and live offshore in deep water — unlike most crabs that only change colour when cooked.
Nutrition Facts
Per 100g Raw Product
Spanner crab is a lean, high-protein seafood option with naturally occurring omega-3 fatty acids.
Energy: 85-90 calories
Protein: ~18-20 g
Total fat: ~0.8-1.2 g
Omega-3 (EPA): ~90-120 mg
Omega-3 (DHA): ~120–150 mg
Omega-6 (AA): ~30-45 mg
All values are approximate.
Cooking Tips
canapes (meat) | eat cold (whole cooked) | steam (whole raw) | ceviche
Fold meat through pasta or risotto | Use in crab cakes or seafood lasagne
Serve chilled with dipping sauce
Because spanner crabs are usually sold cooked, they require minimal preparation and are best enjoyed without heavy sauces
that overpower their flavour. Their meat is delicate and suits a range of dishes.
Seasonality
Queensland spanner crabs are available year round, with supply influenced primarily by offshore sea conditions, fishing effort and fishery management settings, such as a closed season from 1st November to 15th December, rather than a short or highly defined seasonal window.
Because spanner crabs are harvested in offshore waters, availability can fluctuate during periods of rough weather, particularly when strong winds or swell limit safe access to fishing grounds. When conditions are settled, landings are more consistent and supply to market increases.
Habitat
Spanner crabs live on offshore sandy and muddy seabeds, where they bury themselves beneath the surface during the day and emerge to feed. Their flattened, spade-shaped claws are specially adapted for digging and moving through sediment.
Unlike estuarine crabs, spanner crabs do not rely on mangroves or inshore habitats. They are a true offshore species, occurring along Queensland’s coastline from around the southern Great Barrier Reef to the New South Wales border. Healthy offshore seabed environments are essential for supporting spanner crab populations.
How They’re Caught
Spanner crabs are harvested using purpose-built spanner crab pots (dillies), designed specifically for this species. These pots sit on the seabed and are baited to attract crabs without impacting surrounding habitats.
The fishery operates under strict controls, including limited entry, pot limits, size limits and harvest controls like a Total Allowable Commerical Catch (TACC) quota. These annual limits can change based on catch history. Female spanner crabs that are egg-bearing are protected and must be immediately returned unharmed to the water. This targeted approach helps maintain healthy crab stocks and reduce environmental impact.
Important Features
Spanner crabs are named for their distinctive spade-shaped claws, which they use to dig into sandy seabeds. They are one of the few commercially harvested crab species in Australia that live entirely offshore.
Natural colour: Spanner Crabs are naturally an orange colour when alive/raw, turning bright red when cooked - unlike Mud Crabs, which are dark green or brown when alive/raw and only turn red once cooked.
Queensland spanner crab stocks are reported as sustainable under national assessments, with strict management and TACC limits in place to ensure responsible and controlled harvest of this wild fishery.
Did you know?
Spanner crabs are named for their distinctive spade-shaped claws, which they use to dig into sandy seabeds. They are one of the few commercially harvested crab species in Australia that live entirely offshore.
Queensland’s spanner crab fishery is recognised for its strong management, including protection of female egg-bearing crabs and strict harvest controls, helping ensure long-term sustainability.
Unique movement: Unlike most crabs, which move sideways, Spanner Crabs walk forwards, using their long front legs to stride across the ocean floor — a distinctive feature that sets them apart from species like Mud Crabs.
Learn More ...
Learn more about the Spanner Crab Fishery and Management below.