Shellfish Spat

Molluscs breed by broadcast spawning. Nearby molluscs of the same species join the party and clouds of sperm and eggs meet by chance in the vast sea. Hybrid abalone also fertilise where both greenlip and blacklip species exist.

The scale of this event is amazing, as a single abalone can release over 10 million eggs.

Fertilised eggs hatch the next day as free-swimming larvae, providing a feast for predators – only two in one thousand survive. The task of the hatchery is to invert this mortality equation.

The broodstock in the best condition are provided pure filtered surging seawater and special temperature and lighting profiles. Nature rewards us with millions of sperm and eggs, which are precisely mixed to fertilise in perfect conditions. Strong and healthy free-swimming larva grow and find their way to the top of the seawater column to be separated into grades.

This is the miracle of the hatchery and the source of the amazing productivity of mollusc aquaculture.

Part science and part art – the hatchery is a special part of our operation.

With the largest abalone nursery capacity in the Southern Hemisphere, Yumbah can produce Blacklip, Greenlip and Tiger abalone spat for on-growing on farms and wild stock enhancement.

Through a joint venture with Cameron of Tasmania, Yumbah proudly produces oyster spat for the famous Coffin Bay region of South Australia.