Non-commercial vessels arriving in Australian territorial seas must submit a pre-arrival report (PAR), which includes questions on biofouling management. The PAR responses help us manage biosecurity risks associated with biofouling on non-commercial vessels.
Biosecurity officers assess the level of biosecurity risk associated with non-commercial vessel biofouling on arrival and may take necessary actions to address these risks.
Help reduce the risk of biofouling
Refer to the International Maritime Organization’s guidance on biofouling management for recreational boating for information about how you can help protect against the risks of biofouling on your vessel.
High risk areas to target on your vessel
These areas are risks for biofouling on yachts:
- Ancillary gear -Routine maintenance is recommended for all ancillary gear in contact with sea water as biofouling can build up during extended port stays.
- Internal Water System – Seawater is drawn into yachts in internal water systems such as engine cooling, toilet flushing and galley sinks. Port environments can provide the opportunity for marine species to enter internal seawater systems. Regular inspection and maintenance is recommended.
- Underwater hull areas – Prolonged exposure to seawater means the hull poses the greatest risk from biofouling. Correct application and regular maintenance of antifouling paint is highly recommended to prevent build-up of biofouling.
Changes coming
We are developing practical options for non-commercial vessels to proactively manage the risk of biofouling before entering Australian waters. Non-commercial vessels that use these options to proactively manage their biofouling prior to entering Australia will be subject to less intervention on arrival for biofouling. Proactive management of biofouling protects Australia’s marine environment from pests and diseases.
These changes are planned to be introduced in the first half of 2026. Feedback from stakeholders is being used to ensure practical, simple and effective management options are developed. The department will publish further information, including guidance documents, in advance of the options being introduced, with a 12-month education period following their introduction.
More information
Visit the boat owners page for more on how you can help prevent the spread of pests and diseases in our waterways.
View a report on a national survey on recreational boat maintenance practices.