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Aquaculture Enterprises P/L

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NSW (Sydney) Rock Oysters

The Sydney rock oyster, New Zealand rock oyster, or Auckland oyster, is an oyster species endemic to Australia and New Zealand.

Sydney Rock  

Other names:

Commercial oyster, rock oyster, Sydney oyster, or western rock oyster (if from WA).

Family:

Ostreidae (oysters).

Description:

Available farmed, it is a marine and estuarine bivalve that lives intertidally to about 3 metres in sheltered bays and estuaries, especially in mangroves, tolerating a wide range of salinity. Australia’s first aquaculture species (farming began in the 1870s), it is now grown from southeastern Queensland to southern NSW with a small pocket around Albany (WA), though it does occur along the southeast coast as far as Geelong (Victoria). It is endemic to Australia. Its triangular-shaped shell is reasonably smooth and the meat has a pale edge. Previously known by the Latin name Saccostrea commercialis.

Season:

Available year round, with peaks from September to March when they are considered to be in peak condition, although some people like the flintier, less salty flavour they have during winter.

Size and Weight:

Average 40-60g whole weight and 6-8cm shell length, though they can exceed 25cm, they are generally smaller than other Oysters.

Price:

Medium priced.

Relations:

Native Oyster, distinguished by a flatter shell; Pacific Oyster, distinguished by a spikier shell and black edge on the meat.

To Buy:

Generally sold by the dozen or half-dozen, already shucked (opened). Look for lustrous, plump, moist flesh with a pleasant fresh sea smell. Unshucked Oysters should be closed or close when tapped or gently squeezed.

To Store:

Shucked Oysters are best eaten on the day they’re purchased. They can be refrigerated for up to 2 days, but will taste best cooked if not eaten within 24 hours, and can be frozen for up to 3 months, below -18ºC, and used in soups or sauces. Live molluscs should be consumed as soon as possible after purchase. Place in a container, cover with damp paper or cloth and keep in the warmest part of the refrigerator, usually the crisper (optimum 5ºC), ensuring that the covering remains damp.

To Cook:

Average yield is 20-40% from half shell. Has a rich, iodiney flavour, low - medium oiliness and moist, soft, creamy flesh when raw, turning browny-grey when cooked. If not consumed raw, they require very little cooking, either a quick dip in hot oil (usually with a coating) or a very gentle warm through; stop cooking as soon as the edges of the meat start to curl, as overcooked they will be tough and tasteless.

Cooking Methods:

Steam, poach, deep-fry, pan-fry, stir-fry, bake, grill, barbecue, smoke, raw (sashimi), pickle.

Goes well with:

Bacon, breadcrumbs, cream, eggs, fresh herbs, garlic, ginger, green onions, lemon, lime, mirin, pepper, soy, Tabasco, tomato, wasabi, Worcestershire sauce.

Alternatives:

Other Oysters; Blue Mussels can be substituted in some recipes.

Imports:

Pacific Oysters are imported from New Zealand, chilled on the half-shell. Frozen, dried and smoked Oysters are also imported from many countries.

Angasi or Flay Oyster (BELON)

Australian flat oyster, native flat oyster, or angasi oyster, is endemic to southern Australia, ranging from Western Australia to southeast New South Wales and around Tasmania.

Other names:

Angasi, belon, flat oyster, mud, or Port Lincoln oyster.

The Aussie Flat  

Family:

Ostreidae (oysters).

Description:

Available farmed, it is a marine and estuarine bivalve that initially attaches to hard surfaces then breaks free to settle on soft bottoms subtidally from 2-20m. A flat Oyster endemic to southern Australia but now quite scarce, it has had resurgence of popularity and is grown on the southern coast of NSW around Bermagui and Merimbula as well as in small quantities in Tasmania and SA.

Season:

Best from May to August and better avoided from November to March.

Size and Weight:

Average 60-80g whole weight and to 10cm shell length, though they can reach 25cm.

Price:

High priced.

Relations:

Pacific Oyster, distinguished by oval, spiky cupped shell; Sydney Rock Oyster, distinguished by triangular-shaped, cupped shell. Sometimes mistakenly referred to as Belon, the flat European Oyster (O.edulis) to which it is related.

To Buy:

Generally sold by piece, already shucked (opened). Look for lustrous, plump, moist flesh with a pleasant fresh sea smell. Unshucked Oysters should be closed or close when tapped or gently squeezed.

To Store:

Shucked Oysters are best eaten on the day they’re purchased. They can be refrigerated for up to 2 days, but will taste best cooked if not eaten within 24 hours, and can be frozen for up to 3 months, below -18ºC, and used in soups or sauces. Live molluscs should be consumed as soon as possible after purchase. Place in a container, cover with damp paper or cloth and keep in the warmest part of the refrigerator, usually the crisper (optimum 5ºC), ensuring that the covering remains damp.

To Cook:

Average yield is 20-40% from half shell. Has a rich, iodiney flavour, low - medium oiliness and moist, soft, creamy flesh when raw, turning browny-grey when cooked. As a flat Oyster, they have quite a different flavour and texture to other Australian Oysters. If not consumed raw, they require very little cooking, either a quick dip in hot oil (usually with a coating) or a very gentle warm through; stop cooking as soon as the edges of the meat start to curl, as overcooked they will be tough and tasteless.

Cooking Methods:

Steam, poach, deep-fry, pan-fry, stir-fry, bake, grill, barbecue, smoke, raw (sashimi), pickle.

Goes well with:

Bacon, breadcrumbs, cream, eggs, fresh herbs, garlic, ginger, green onions, lemon, lime, mirin, pepper, soy, Tabasco, tomato, wasabi, Worcestershire sauce.

Alternatives:

Blue Mussels can be substituted in some recipes.

Imports:

Pacific Oysters are imported from New Zealand, chilled on the half-shell. Frozen, dried and smoked Oysters are also imported from many countries.