Marine pests

What is a marine pest?

A marine pest is a non-native marine plant or animal that harm Australia’s marine environment, social amenity or industries that use the marine environment, or have the potential to do so if they were to be introduced, established (i.e. forming self-sustaining populations) or spread in Australia’s marine environment.

However, not all marine pests are from outside Australia. Some are native to other regions of our country and have been transported into NSW, for example, through domestic shipping or the aquarium trade.

How are marine pests introduced?

Marine pests have been introduced into Australian waters in various ways, including in ballast waters, attached to the hulls of international ships, or imported deliberately as aquarium or aquaculture species. An estimated 250 introduced marine species have been introduced into Australian waters in these ways.

Which species are marine pests?

What impacts do they have?

Marine pests can have severe ecological and economic impacts. For example, they can take over large areas of habitat to the detriment of native species. Some prey directly on native species or compete with them for food.

Pest species can also cause considerable economic damage. Infestations of marine pests can impact on marine industries, such as aquaculture, commercial and recreational fishing and boating, tourism and even international and domestic shipping. Some marine pests, such as toxic dinoflagellates, can threaten public health.

What is NSW DPI doing about marine pests?

NSW DPI is involved in the National System for the Prevention and Management of Marine Pest Incursions (www.marinepests.gov.au) which aims to prevent the introduction and translocation of introduced marine species (by managing ballast water, biofouling and other vectors), provide a national emergency preparedness and response capacity for outbreaks, and to manage and control introduced marine species that cannot be eradicated.

NSW DPI is involved in the development of the National System for the Prevention and Management of Marine Pest Incursions (www.marinepests.gov.au) which aims to prevent the introduction and translocation of introduced marine species (by managing ballast water, biofouling and other vectors), provide a national emergency preparedness and response capacity for outbreaks, and to manage and control introduced marine species that cannot be eradicated.

NSW DPI Chairs a multiagency and stakeholder working group that is tasked with providing input into NSW marine pest management actions and to provide a forum to discuss national marine pest policy issues. This group is currently working on a guideline for NSW stakeholders to support the national in water cleaning and anti-fouling guidelines.

NSW DPI also has an extensive advisory program to raise awareness of marine pests including how to identify marine pests and how to help prevent their spread. For more information see links below to marine pest publications:

What can you do to help?

Members of the public, including fishers, divers and members of local environmental groups, are sometimes the first to notice a new introduced marine species or the fact that an existing pest has spread into a new area. This information can be very valuable in helping to manage pest problems. Please report any suspect pest or disease to the Aquatic Biosecurity Team on (02) 49163877 or by email aquatic.pests@dpi.nsw.gov.au

Under new NSW Biosecurity legislation (NSW Biosecurity Act 2015) people are expected to have a basic level of knowledge about the biosecurity risks they might encounter in their normal work and general biosecurity duty activities. All community members have a responsibility to consider how actions, or in some cases lack of action could have a negative impact on another person, business enterprise, animal or the environment. We must then take all reasonable and practical measures to prevent or minimise the potential impact.

Related links