Discovery off headland highlights growing problem plaguing Australia’s oceans: ‘Massive
Ghost nets—abandoned or lost fishing gear—are increasingly smothering Australian marine ecosystems. Recent efforts by individuals like South Australian resident Andy Alford have highlighted the scale of this debris, as volunteers haul heavy, persistent ropes from coastlines near Victor Harbor. These nets remain lethal long after being discarded, drifting with currents to entangle marine life and degrade coastal habitats.
The Impact of Ghost Nets on Marine Life
Ghost nets pose a significant threat because they remain buoyant and nearly invisible beneath the water’s surface. According to marine debris experts, these nets drift for years, trapping whales, turtles, dugongs, and other wildlife. When they wash ashore, they cause further damage by smothering seagrass and strangling vegetation along the coastline.
The problem is compounded as these materials break down into microplastics. With global estimates suggesting 8 to 10 million tonnes of plastic enter the ocean annually, experts warn that the volume of plastic waste could potentially outweigh all the fish in the sea within the next 25 years.
Scientists have reported finding ghost nets approximately every kilometre in parts of the Northern Territory, often tangled in rocks, buried in sand, or lodged in mangroves.
The Logistical Challenge of Cleanup
Removing this debris is a painstaking, manual process. Karolina Strittmatter, marine debris campaign coordinator at Sea Shepherd, notes that the work is logistically challenging because every piece of trash must be recovered by hand. In many cases, nets are deeply entangled in vegetation or buried beneath layers of sand, requiring significant physical effort to extract.
The variety of debris collected by field workers is extensive. Wanga Mununggurritj, a Senior Ranger with the Dhimurru Aboriginal Corporation, has reported recovering items ranging from lighters, toothbrushes, and rubber thongs to shampoo bottles and various food packaging, alongside the discarded fishing nets.
The persistence of these materials creates a compounding environmental crisis. Because the nets are designed to be durable and effective at trapping marine life, their abandonment effectively turns them into automated, long-term hazards. The shift from large, visible nets to microplastics means that the ecological damage will likely persist long after the initial debris is cleared from the beach.
What May Happen Next
As volunteer-led cleanup efforts continue, the volume of recovered material is likely to remain high, particularly in known hotspots like the Northern Territory. If the rate of accumulation continues at current levels, analysts expect that the burden on local rangers and volunteers will increase, necessitating more complex recovery strategies to manage the debris buried deep within coastal substrates.
Future efforts may focus on the ongoing challenge of clearing massive, heavy clumps of rope, which often require cutting and methodical removal. Without a reduction in the initial loss of fishing equipment at sea, the cycle of pollution and subsequent manual removal is expected to remain a critical, ongoing operational challenge for coastal management.
Frequently Asked Questions
What are ghost nets?
Ghost nets are fishing nets that have been lost, abandoned, or discarded at sea. They remain buoyant and drift with currents for years.
Why is the cleanup process difficult?
The removal process is logistically challenging because it must be done by hand. Nets are often buried under sand or tangled in vegetation, making them difficult to retrieve.
What happens to ghost nets over time?
Beyond entangling marine life, these nets break down into microplastics, which contributes to the broader, long-term problem of marine pollution.
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