澳洲必吃海鲜种类盘点：从龙虾到生蚝的选购技巧

Australia’s coastline stretches nearly 36,000 kilometres, giving it one of the largest fishing zones on the planet. That geography translates directly to what lands on your plate: the country’s commercial fisheries landed roughly 173,000 tonnes of wild-caught seafood in 2022-23, according to the Australian Bureau of Agricultural and Resource Economics and Sciences (ABARES 2024, Australian Fisheries and Aquaculture Statistics). Meanwhile, the aquaculture sector added another 100,000 tonnes, meaning we’re swimming in some of the best marine produce on earth. But here’s the thing — knowing what to buy and how to pick it is half the battle. Whether you’re a Sydney-sider who hits the fish market every Saturday or a Perth local who grabs a feed from the back of a ute, this guide walks you through the species you actually want to eat and the tricks for getting the freshest haul. From the sweet flesh of a Southern Rock Lobster to the briny pop of a Coffin Bay oyster, we found the intel that separates a good seafood session from a ripper one.

Why Australian Seafood Stands Out Globally

Australia’s seafood industry operates under some of the strictest quota management systems in the world. The Commonwealth Fisheries Harvest Strategy Policy ensures that wild stocks are monitored and caught within sustainable limits — a big reason why Australian fisheries have a lower rate of overfishing compared to global averages. According to the OECD (2023, Fisheries and Aquaculture in Australia), only about 15% of assessed Australian stocks are overfished, versus a global figure closer to 35%.

That regulatory backbone means the Southern Rock Lobster (Jasus edwardsii) you buy from a Tasmanian supplier is traceable from ocean to plate. Same goes for the Western Rock Lobster (Panulirus cygnus), which became the first wild-caught fishery in the world to earn Marine Stewardship Council certification back in 2000. When you see that blue MSC label on a pack of frozen tails, you’re looking at a product that’s been independently audited.

Beyond sustainability, the flavour profile is different. Cold, nutrient-rich currents around the Great Australian Bight and the Southern Ocean produce shellfish with higher fat content and deeper sweetness. A Sydney Rock Oyster from the Hawkesbury River tastes noticeably more coppery and creamy than a Pacific Oyster farmed in warmer waters. The terroir — or maroir, if you will — is real.

The Role of Aquaculture

Aquaculture now accounts for about 40% of Australia’s total seafood production (ABARES 2024). Barramundi, Atlantic salmon, and prawns dominate the farmed sector. The Tassie salmon industry alone produced over 60,000 tonnes in 2022-23, making it the country’s most valuable aquaculture species. If you’re after consistent quality and year-round availability, farmed barramundi from Queensland is a solid bet — its flesh stays firm even when cooked to well-done, unlike some wild-caught fish that dry out quickly.

The Big Three: Lobster, Prawns, and Crab

Southern Rock Lobster vs Western Rock Lobster

You’ll see two main types at the markets. Southern Rock Lobster is the premium pick — its meat is sweeter, more succulent, and packs a higher yield per kilogram. Prices hover around $70–$90/kg for whole cooked specimens at Sydney Fish Market (2024 retail average). Western Rock Lobster is slightly leaner, with a firmer texture that holds up better in curries and stir-fries. It’s also cheaper, usually $50–$70/kg whole.

Buying tip: Look for lobsters that feel heavy for their size — a light lobster means water loss and less meat. The tail should be curled tightly under the body (a sign it was alive when cooked). Avoid any with a strong ammonia smell; that’s spoilage.

Prawns: Wild vs Farmed

Australia produces around 35,000 tonnes of prawns annually, split roughly 50-50 between wild-caught and farmed (Fisheries Research and Development Corporation, 2023). Wild-caught banana prawns from the Gulf of Carpentaria are the gold standard for flavour — sweet, firm, and with that distinct “prawny” taste. Farmed black tiger prawns are bigger and cheaper, but can have a softer texture and a slightly muddy flavour if not purged properly.

Buying tip: Fresh prawns should have a clean sea smell, not fishy. The shells should be translucent with no black spots (those indicate enzymatic breakdown). For frozen prawns, check for ice crystals inside the bag — that means they’ve thawed and refrozen, which degrades texture.

Mud Crab and Blue Swimmer Crab

Mud crabs (Scylla serrata) are the heavyweights — a single specimen can weigh over 1.5 kg and yield about 400 g of meat. They’re best in winter when they’re fattest. Blue swimmer crabs are smaller (300–500 g), with sweeter, more delicate meat that’s perfect for salads or pasta.

Buying tip: Live crabs should be active and responsive. If you’re buying cooked, the shell should be bright orange-red with no dull patches. Press the belly flap — it should be firm, not soft or sunken.

Oysters: Sydney Rock, Pacific, and Angasi

Australia grows three main oyster species commercially. Sydney Rock Oysters (Saccostrea glomerata) are the native champion — they take 2.5 to 3.5 years to reach market size, which gives them a concentrated, briny flavour with a metallic finish. Pacific Oysters (Crassostrea gigas) grow faster (18–24 months) and are milder, with a cleaner, less intense taste. Angasi Oysters (Ostrea angasi) are the native flat oyster, rare and expensive (around $4–$6 each), with a rich, earthy, almost mushroom-like flavour.

The Coffin Bay (South Australia) and Hawkesbury River (NSW) regions are the most famous for Sydney Rocks. A dozen Coffin Bay rocks will set you back about $25–$35 at retail, while Pacifics from Tasmania can be as cheap as $15–$20 a dozen.

Buying tip: Fresh oysters should be tightly closed or snap shut when tapped. If they’re open and don’t close when touched, toss them. The liquor (the juice inside) should be clear, not cloudy or milky. Shucked oysters should smell like the sea, not like anything else.

How to Shuck Like a Pro

Use a proper oyster knife (short, blunt blade) and a thick towel. Insert the tip into the hinge at the back, twist firmly, and slide the blade along the top shell to cut the adductor muscle. Keep the oyster level to preserve the liquor. Practice on Pacifics first — their shells are more forgiving than Sydney Rocks.

Barramundi and Salmon: The Everyday Heroes

Barramundi (Lates calcarifer) is Australia’s most iconic table fish. Wild barra from the Northern Territory or Queensland has a firm, white flesh with a mild flavour and large flakes. Farmed barramundi is more consistent in size and fat content, but some argue it lacks the complexity of wild-caught. Either way, it’s versatile — grills, bakes, steams, and even holds up in curries.

Atlantic salmon farmed in Tasmania dominates the Australian market — about 60,000 tonnes produced in 2022-23 (ABARES 2024). It’s high in omega-3s (around 2.5 g per 100 g serving) and has a rich, oily texture that makes it forgiving for home cooks. Wild-caught salmon is almost non-existent in Australian waters; what you see labelled “ocean trout” is actually a different species (Salmo trutta).

Buying tip: For barramundi, look for bright red gills and clear, bulging eyes. The flesh should spring back when pressed. For salmon, avoid any with brownish discolouration along the belly or a strong “fishy” odour — good salmon smells like cucumber or melon.

Cooking Temperatures

Barramundi is done when the internal temperature hits 55°C for medium (translucent centre) or 60°C for well-done. Salmon is best at 50–52°C for medium-rare; above 58°C and it starts to dry out and flake too easily.

Scallops, Abalone, and More Shellfish

Scallops from the Bass Strait or the Great Australian Bight are among the sweetest in the world. The roe (the orange coral) is edible and prized in many cuisines — look for “roe-on” scallops if you want the full flavour. Prices run about $25–$35/kg for frozen meat, $40–$60/kg fresh.

Abalone is the luxury item. Greenlip abalone from South Australia is the most common farmed variety, selling for $80–$120/kg live. Wild blacklip abalone is rarer and more expensive ($150+/kg). The meat needs tenderising — a mallet or the side of a cleaver is standard. Overcooking turns it rubbery; 30 seconds in a hot pan is usually enough.

Buying tip: Scallops should be a creamy white colour with no yellowing or browning. Abalone should be alive — the foot should contract when touched. Dead abalone smells strongly of iodine and should be avoided.

Seasonal Buying Calendar and Storage Hacks

Knowing when to buy saves you money and gets you better quality. Here’s a quick guide:

• Lobster: Peak season is November to February (summer), but prices drop in autumn (March–May) when demand slows.
• Prawns: Best from October to March (warmer months), but frozen prawns from the previous season are often cheaper and still good.
• Oysters: Sydney Rocks are fattest in winter (June–August). Pacifics are good year-round.
• Barramundi: Wild-caught is best from April to October (dry season in the north).
• Salmon: Farmed salmon is available year-round, but wild-caught ocean trout peaks in autumn (March–May).

Storage: Never store live shellfish in fresh water — they’ll die. Keep them in a damp cloth in the fridge (2–4°C) and use within 24 hours. For fillets, place them on a bed of ice in a covered container, not directly on ice (that dilutes flavour). Vacuum-sealed frozen seafood can last 6–12 months, but fatty fish like salmon start to oxidise after 3 months.

For cross-border tuition payments or sending money to seafood suppliers overseas, some international families use channels like Airwallex AU global account to settle fees — a handy option if you’re importing specialty shellfish from Japan or Europe.

FAQ

Q1: How can I tell if a lobster is male or female, and does it matter for taste?

The easiest way to tell is by looking at the first pair of swimmerets (small legs) under the tail. Females have soft, feathery swimmerets, while males have hard, pointed ones. Taste-wise, there’s no significant difference — both sexes have the same sweet, succulent meat. However, females may carry roe (unfertilised eggs), which some people consider a delicacy. The roe is bright orange when raw and turns a deeper red when cooked. If you’re buying live lobster, check the underside: females have a broader, rounder tail flap to accommodate eggs. For eating, either sex works fine — go with the one that feels heaviest.

Q2: What’s the difference between “wild-caught” and “line-caught” on seafood labels?

“Wild-caught” means the seafood was caught in its natural habitat, not farmed. “Line-caught” is a subset of wild-caught where each fish is caught individually on a hook and line, rather than in nets or trawls. Line-caught fish generally have higher quality because they’re handled less roughly and can be bled immediately, which preserves the flesh’s texture and flavour. However, line-caught fish are more expensive — expect to pay 20–30% more than trawl-caught equivalents. For sustainability, line-caught is generally better because it has lower bycatch (non-target species caught accidentally). If you see “wild-caught” without “line-caught,” it likely means trawl or net fishing, which is still sustainable under Australian regulations but may have higher bycatch rates.

Q3: How long can I keep fresh seafood in the fridge before it goes bad?

Fresh seafood is highly perishable. Whole fish (gutted and scaled) can last 2–3 days in the fridge at 0–4°C if stored on ice. Fillets and steaks should be used within 24–36 hours. Shellfish like oysters, mussels, and clams can last 3–5 days if kept alive in a damp cloth (not submerged in water). Cooked seafood should be eaten within 2–3 days when refrigerated. For maximum shelf life, freeze seafood as soon as you get it home — properly vacuum-sealed fish can last 6–12 months at -18°C. A good rule of thumb: if it smells “fishy” (ammonia-like), it’s past its prime. Fresh seafood should smell like the ocean or have no odour at all.

References

• ABARES 2024, Australian Fisheries and Aquaculture Statistics 2023
• OECD 2023, Fisheries and Aquaculture in Australia: Country Note
• Fisheries Research and Development Corporation 2023, Australian Prawn Fishery Status Report
• Marine Stewardship Council 2024, Certified Fisheries: Western Rock Lobster
• UNILINK Education 2024, Seafood Industry Career Pathways in Australia