Bottom Trawling and the Myth of Zero-Harm Food

Bottom trawling is often attacked as uniquely destructive, but every food system has an impact. The honest question is not whether food production causes harm. It is whether we are willing to measure that harm fairly.

Bottom trawling has become one of the easiest targets in the modern food debate.

To activists, it is often presented as a kind of underwater bulldozer, sweeping across the ocean floor without limit, destroying everything in its path and leaving nothing behind but broken habitat and dead marine life.

It is a powerful image.

It is also incomplete.

That does not mean bottom trawling has no impact. Of course it does. Any form of food production has impact. Fishing has impact. Farming has impact. Transport has impact. Processing has impact. Even the most carefully marketed plant-based food system has impact.

The problem is not that people question bottom trawling. They should. Any food-producing industry should be questioned, measured and managed.

The problem is that bottom trawling is often judged against an imaginary alternative: a food system with no animal death, no habitat loss, no machinery, no fuel, no land clearing, no chemical use, no pest control and no ecological trade-offs.

That food system does not exist.

Bottom Trawling Is Not One Thing

One of the biggest problems in the public debate is that the words “bottom trawling” are often used as though they describe one single activity.

They do not.

There are different gears, different fisheries, different seabeds, different depths, different target species, different bycatch controls and different levels of management.

A small, local, regulated prawn trawl fishery in Australia is not the same as a large industrial fleet operating overseas in deep water, over vulnerable seabed, or under weaker management. A trawl working in a naturally mobile estuary is not the same as heavy fishing pressure placed on fragile deep-sea coral, sponge habitat or complex marine ecosystems.

Those distinctions matter.

Even GoodFish, which is not a fishing industry lobby group, states that bottom trawling can be sustainable in Australia with hard work, while also recognising that serious sustainability challenges remain and that risks are reduced through strict management and innovation.

That is the debate we should be having.

Not slogans. Not campaign images. Not imported outrage from overseas examples. The real debate should be about where trawling occurs, what gear is used, what habitat is being worked, how often it is worked, what is being caught, what is being released, what is closed, and what is being monitored.

The Ocean Floor Is Not a Flat Paddock

A common activist image suggests that bottom trawling can happen anywhere there is ocean.

That is not how trawling works.

The ocean floor is not a flat paddock. It is made up of mud, sand, reef, rock, weed beds, channels, holes, drop-offs, banks, slopes and rough ground. Some areas can be trawled. Many cannot.

A bottom trawl needs ground where the gear can be towed safely and effectively. Rough ground can damage gear. Reef and rock can make trawling impractical or impossible. Steep, broken or complex seabed can limit access. Depth, current, weather, closures, vessel size, economics and local knowledge all narrow the actual area where trawling can occur.

This is one of the most important facts missing from the public debate.

Bottom trawling does not occur across “the ocean”. It occurs within a much smaller trawlable footprint.

CSIRO has reported that the current Australian trawl footprint is about 1.1 per cent of Australia’s continental Exclusive Economic Zone, and that 54.8 per cent of that EEZ is protected from trawling through closures and reserves. CSIRO also reports that trawling in Australia occurs on the shelf and slope, shallower than 1,500 metres, where the trawl footprint is 3.4 per cent and 37.9 per cent is protected.

That does not mean there is no impact inside the trawl footprint.

It means the scale needs to be discussed honestly.

A small, defined, managed fishing footprint is not the same as destroying the ocean floor. If activists want to talk about impact, then talk about actual impact. Talk about actual grounds. Talk about actual effort. Talk about actual closures. Talk about actual bycatch controls. Talk about actual recovery. Talk about actual food production.

Do not pretend the whole ocean is being dragged.

Management Matters Across Australian Trawl Fisheries

Australian trawl fisheries are not open-slather operations. They sit within layers of management, and while the rules differ between Commonwealth, state and territory fisheries, the basic principle is the same: access is limited, gear is regulated, fishing areas are controlled, bycatch is managed, and fishing activity is monitored.

That does not make every fishery perfect.

It does mean the public should stop treating Australian trawl fisheries as though they are unmanaged industrial free-for-alls.

In Commonwealth fisheries, harvest strategies provide a framework for setting catch limits and managing stocks. The Australian Government says its Harvest Strategy Policy aims to manage key commercial species for long-term biological sustainability, maximise net economic returns, and provide industry with a more certain operating environment.

Commonwealth fisheries are also subject to bycatch and ecological risk management processes. AFMA states that ecological risk assessments are used to identify species, habitats or communities at risk from fishing impacts, and that these assessments help managers make informed decisions without needing exhaustive data for every species.

At the state level, trawl fisheries are also managed through licences, limited access, area controls, seasonal closures, vessel rules, gear restrictions, reporting requirements and, in many fisheries, bycatch reduction devices.

Across northern Australian prawn trawl fisheries, turtle excluder devices and bycatch reduction devices have been mandatory for many years. These are not symbolic measures. They are practical changes developed to reduce the capture of non-target species while allowing domestic seafood production to continue.

This is where the debate needs to be honest.

Australian fisheries are always improving. Gear improves. Reporting improves. Science improves. Bycatch reduction improves. Spatial management improves. Fishers adapt because they are the ones working the water and living with the rules.

But improvement should not be used as a polite word for removal.

There is a major difference between improving Australian fisheries and removing Australian fishers from the water to comply with UN regulations, UN-aligned targets or international political commitments. Australia should not sacrifice its remaining domestic food producers simply to satisfy global reporting frameworks or imported environmental campaigns.

There are not many Australian commercial fishers left.

Every reform reduces that number further. Every new closure, every extra compliance cost, every rule change, every licence reduction and every added reporting burden pushes more operators out. Some leave because the economics no longer work. Some leave because the uncertainty becomes too great. Some leave because they are tired of being treated as a problem to be managed rather than food producers to be valued.

And once they are gone, they are not easily replaced.

A commercial fishery is not just a licence on paper. It is knowledge, gear, vessels, crew, local markets, working waterfronts, processing connections, fuel access, repair networks, seasonal understanding and generational skill. Remove the fishers and you do not just reduce effort. You remove capacity.

That matters for food security.

A serious discussion should ask whether the rules are effective, whether closures are properly designed, whether bycatch reduction is working, whether monitoring is adequate, whether data is transparent, whether management is proportionate, and whether reform is improving the fishery or simply shrinking it.

But that is very different from pretending Australian trawl fisheries are simply boats dragging blindly across the sea.

A lazy discussion says “bottom trawling bad” and moves on.

A serious discussion asks what fishery, what gear, what ground, what rules, what footprint, what bycatch controls, what evidence, what food supply would replace it, and how many fishers will be left after the next round of reform.

The Vegan Movement and the Zero-Harm Illusion

The vegan movement often presents itself as the ethical high ground in food production.

But even vegan organisations know there is no such thing as zero-harm food.

The Vegan Society defines veganism as seeking to exclude exploitation and cruelty to animals “as far as is possible and practicable.” That phrase matters. It recognises that total avoidance of harm is not possible in the real world.

Vegan Australia has also acknowledged that, at the moment, it is not practicable to avoid consuming plant products where animals have been harmed in their production, particularly before harvest.

That is the uncomfortable truth.

Plant agriculture is not bloodless.

Animals are killed when land is cleared. Animals are poisoned as pests. Insects are killed by pesticides. Field animals can be crushed or displaced by machinery. Birds, reptiles, rodents, insects and aquatic life can all be affected by the systems that grow, store, transport and process plant foods.

This does not mean people cannot choose a vegan diet.

It does mean vegan activists should stop pretending their food arrives without death.

Verified Deaths, Hidden Deaths

One reason bottom trawling is such an easy target is that its impacts are visible.

A net is visible. A boat is visible. A catch is visible. A dead fish is visible.

The impacts of plant agriculture are often hidden.

The mouse killed in a grain harvest is not filmed. The insects killed by pesticide are not placed on a campaign poster. The native habitat cleared for cropping is not sitting on a seafood counter. The pest animal poisoned to protect a crop is not shown on a restaurant menu. The fertiliser runoff entering a waterway does not come with a label.

But hidden impact is still impact.

It would be wrong to throw around inflated numbers just to win an argument. But it is equally wrong for activists to speak as though plant-based food production is clean, harmless and morally untouched.

The honest position is simple.

All food has a footprint.

The Hypocrisy Is the Double Standard

The hypocrisy is not that vegans eat plants. Everyone has to eat something.

The hypocrisy is when activists condemn bottom trawling because animals die, while ignoring the animals that die in the food systems they promote.

The hypocrisy is when activists show footage of trawl gear touching the seabed, but say little about land clearing, chemical use, pest control, monoculture, machinery, transport and industrial processing.

The hypocrisy is when they demand perfection from seafood producers, but accept “as far as practicable” for themselves.

The hypocrisy is when a local, regulated, food-producing fishery is treated as immoral, while imported, processed, packaged plant-based food is treated as ethical by default.

The issue is not whether vegan food has more impact than seafood in every case. That would be too broad a claim. Some plant-based foods have lower measured environmental impacts than many animal products, especially in global studies of land use and emissions.

But that does not erase the central point.

Lower impact does not mean no impact.

And it certainly does not justify pretending local seafood production is uniquely destructive while plant agriculture is morally clean.

Do Not Compare Bottom Trawling to Nothing

This is the trick at the centre of many anti-trawling arguments.

Bottom trawling is compared to nothing.

Not another food system. Not imported seafood. Not industrial cropping. Not aquaculture feed production. Not land-based protein. Not processed meat substitutes. Not supply chains running through ports, factories, trucks, cold storage and supermarkets.

Just nothing.

That is not a serious comparison.

If bottom trawling is restricted or removed, people do not stop eating. They eat something else. That something else has to come from somewhere. It has to be grown, caught, farmed, processed, imported, transported or manufactured.

The replacement has a footprint too.

That replacement may be imported seafood from countries with weaker labour, environmental and transparency standards. It may be more industrially farmed protein. It may be aquaculture dependent on feed inputs. It may be ultra-processed plant-based products with long supply chains. It may be food grown on land that once supported native habitat.

None of these alternatives are impact-free.

So the real question is not:

“Does bottom trawling have impact?”

The real question is:

“Compared to what?”

If bottom trawling must account for its impacts, then the seafood that replaces it must be held accountable too. If Australian fishers are pushed off the water and consumers are left eating more imported seafood, aquaculture product or substitute protein, those replacement systems should face the same scrutiny over bycatch, habitat impact, labour standards, chemical use, feed inputs, fuel, transport, traceability and food security.

Local Food Security Matters

There is also a food security issue here.

Australia already imports a large share of the seafood it consumes. Every domestic fishery pushed out of production makes the country more dependent on imported food.

That matters.

It matters when global supply chains are disrupted. It matters when fuel prices rise. It matters when foreign countries prioritise their own populations. It matters when local skills disappear. It matters when ports, processing, cold storage and fishing knowledge are allowed to decay.

A local trawl fishery is not just a boat and a net. It is part of a domestic food system.

It supports local seafood supply. It supports working waterfronts. It supports regional knowledge. It supports skills that cannot be rebuilt overnight. It supports a connection between Australian consumers and Australian waters.

If activists succeed in shutting down local production without considering the replacement, they may not reduce harm. They may simply move the harm offshore, out of sight and out of reach.

That is not environmental responsibility.

That is outsourced consequence.

The Honest Standard

Bottom trawling should be judged honestly, but so should every food system that claims to feed people while protecting the environment.

The standard is not perfection. Perfection does not exist. The standard is evidence, scale, management, transparency and context.

That means asking where trawling occurs, what seabed is worked, what gear is used, what bycatch controls exist, what areas are closed, what food is produced, and what would replace that food if the fishery was removed.

It also means asking whether replacement seafood, imported product, aquaculture or substitute protein would face the same scrutiny, and how many Australian commercial fishers will be left after the next round of reform.

Those are serious questions.

They are better than slogans.

Conclusion: Food Production Has Consequences

Bottom trawling is not above criticism.

No food system is.

But it should not be condemned through lazy slogans, emotional imagery and false comparisons against imaginary zero-harm alternatives.

The ocean floor is not a flat paddock. Bottom trawling does not happen everywhere. In Australia, the actual trawl footprint is small compared with the size of the marine estate, and large areas are closed to trawling. Gear type, seabed type, topography, closures, bycatch controls and management all matter.

Australian fisheries should keep improving. They should be measured, reviewed and refined. But improvement should not mean removing the few remaining Australian commercial fishers from the water to satisfy UN regulations, international targets or political campaigns that do not have to replace the food they remove.

The vegan movement is right about one thing: food choices have moral consequences.

But that principle cuts both ways.

If bottom trawling must account for its impacts, then the seafood that replaces it must be held accountable too. If Australian fishers are pushed off the water and consumers are left eating more imported seafood, aquaculture product or substitute protein, those replacement systems should face the same scrutiny over bycatch, habitat impact, labour standards, chemical use, feed inputs, fuel, transport, traceability and food security.

The point is not to attack people for what they eat.

The point is to end the double standard.

Food production is not a choice between harm and no harm. It is a choice between different systems, different impacts, different trade-offs and different levels of honesty.

Bottom trawling deserves scrutiny.

So does everything else on the plate.