Farming oysters from an experienced mussel farmers perspective, we have taken an outside the square look and designed equipment to produce premium quality oysters in deep waters. Intertidal Oyster Solutions Pty Ltd (IOS), established in 2010, has developed aquaculture systems, varying environmental conditions from intertidal, floating and deep-water, on neighbouring longlines. We collect wild-caught angasi spat (seed) on catching slats on our marine farm, and take this spat from larvae through to market size. Trading as The Oyster Province we have sold small commercial quantities of premium quality angasi and Pacific oysters (hatchery spat) into the half-shell market. 

The different environments give the oysters the best growing conditions

Intertidal

        the oysters experience sunlight, air-drying and wave action

        biofouling is kept under control

        shells harden and develop sheen and become cup-shaped

        the oysters abductor muscle strengthens

Floating

        the oysters are rumbled and cleaned by the wave action

        they become cup-shaped as their shell chips back

        biofouling is kept under control

Deep-water

        the oysters continually feed, grow and fatten in the algae rich cold-deep waters

        when biofouling builds up on the oysters and their baskets over several weeks they

        are moved to either the intertidal or floating lines

 

Growing angasi oysters

Angasis are a sub-tidal species naturally occurring in the deeper waters outside the intertidal zone. Grown mainly in deep water, with short duration of either intertidal or floating sub-surface conditions, enhances their meat quality, keeps them clean, and improves their shell shape and hardness. In contrast, Pacific oysters are an intertidal species, grown mainly in the intertidal zone. Both species thrive in these tailored growing conditions.

Spat is in seed trays with 3 mm mesh accessing algae rich water. It can take an oyster 6 months or more to reach size suitable for a 6mm mesh basket.

Every 8 weeks their baskets are changed. The oysters are graded to size and the numbers lessened/basket to ensure good water flow and space as they grow.

The angasi shells are thin and easily damaged during early growth. With inter-tidal exposure their shells harden and they are robust.

We use a machine grader, on our barge at the lease, to group the oysters according to their shell size.

By 18 months the shells are hardened and growth ridges on the bottom shell show how the oysters have become cup shaped over time.

Oysters are organically grown, filtering natural microscopic algae from their surrounding cold deep waters -oysters cultivated for 3 years.

See more photos in our Gallery

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