Sea cage systems

Sea cages are a common production system used for intensive marine aquaculture of fin fish.

Sea cage aquaculture is one of the most successful and profitable farming systems, and has demonstrated significant economic benefits in other Australian states and internationally.

Characteristics of sea cage systems

The type, size and design of cages are dependent upon a number of factors, including the culture species, site conditions and environmental features.

Cage nets are commonly made of nylon mesh. Semi-rigid PVC coated polyester, brass and galvanised steel netting are also used and may be more resistant to biofouling and to prevent predation from sharks and other marine animals.

Suitable species for sea cages

There is currently one sea cage fish farm that is approved to operate in Queensland and grow barramundi. Other species that could be grown in sea cage systems include:

• barramundi cod
• cobia
• coral trout
• lobster
• mulloway
• snapper.

Things to consider

Experience has shown that sea cage fin fish culture can be practised in an ecologically sustainable manner. A well-managed farm with good husbandry practices will have little impact on the environment.

In other states, financial and technical innovation applied to sea cage culture has allowed fish farming industries to expand rapidly.