Ships Without License Plates: The Dark Fleet Behind Fishmeal
How To Protect The Ocean
In a single day in March 2024, Gambian navy officers arrested eight industrial trawlers. Seven were fishing in waters reserved for local canoes, four were using illegal nets, and every one had switched off its tracking beacon. That one patrol shows a problem playing out across the global ocean. About three in four industrial fishing vessels are not publicly tracked, and many of the boats supplying the fishmeal that feeds farmed fish are among the hardest to see. In this episode of How to Protect the Ocean, Andrew Lewin follows the boats that catch the fish behind fish feed. He covers how...
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Whose Dinner Becomes Fish Feed?
How To Protect The Ocean
On a May morning in 2017, the people of Gunjur in The Gambia woke to find their lagoon had turned red, with dead fish on the surface. Investigators traced the pollution to a fishmeal plant up the road. In this episode, Andrew Lewin follows the feed from West African beaches to farmed salmon fillets in Europe and North America, building on The Outlaw Ocean Project’s five-year investigation into the fishmeal industry. Small, oily fish like sardinella and bonga are everyday protein in Senegal and The Gambia. Fishmeal plants buy them in unlimited volumes, outbid the women who have smoked and...
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The Fish That Feed Your Fish: What Farmed Salmon Really Eat
How To Protect The Ocean
The family behind the world’s largest salmon farming company built a global industry. Now one of its members is asking how it can be sustainable to grind up fish from poorer countries, ship them across the world, and feed them to salmon sold to wealthier shoppers. In episode 2048, Andrew Lewin follows farmed fish from your plate back to the fishmeal boat to answer him. More than half the seafood eaten worldwide now comes from farms, and most of it is fed. Andrew breaks down what fishmeal and fish oil are made of, why roughly a fifth of the global wild catch ends up as feed, and how forage...
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What Your Farmed Salmon Ate: Inside a Five-Year Fishmeal Investigation
How To Protect The Ocean
More than half the seafood eaten on Earth now comes from fish farms, and most of those farmed fish are raised on fishmeal made from wild-caught fish. Maya Martin, deputy editor at The Outlaw Ocean Project, joins Andrew Lewin to unpack Food for Feed, a five-year investigation that traced fishmeal from the ships that catch it, through the plants that grind it, to the farmed fish on your plate. Maya explains how forage fish like sardinella and anchoveta are pulled from waters off West Africa, Peru and Southeast Asia, often from stocks that are already overexploited and from communities that...
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How to Read the Seafood Counter Like a Marine Biologist
How To Protect The Ocean
Picture a big sign over the seafood counter promising sustainable fishing, with a fish every independent guide says to avoid sitting on ice right below it. In most countries nobody broke a rule, because the word "sustainable" on seafood has no legal definition. In this final episode of our sustainable seafood week, Andrew Lewin walks you through how to see past that sign and choose seafood you can feel good about. You'll learn how to use the eco-labels and seafood guides that have already done the research for you, including the Marine Stewardship Council's blue tick for wild seafood, the...
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Is Bottom Trawling Always Bad? It Depends Where
How To Protect The Ocean
Off the south coast of England, about 100 kilometres out, sits Haig Fras, a granite reef covered in jewel anemones and cup corals. For years it was protected on paper, yet heavy fishing gear could still drag across it. In March 2024, that finally changed. In this episode, Andrew Lewin explains why where we fish matters as much as how much we fish, and what it takes to turn a line on a map into real protection. Andrew breaks down the difference between midwater and bottom trawls and puts the damage shown in the recent Ocean documentary into context. Bottom trawling lands about a quarter of the...
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The Trapdoor That Saves Sea Turtles From Shrimp Nets
How To Protect The Ocean
A Kemp’s ridley sea turtle, the most endangered sea turtle on Earth, gets swept into a shrimp trawl. It hits a metal grid, slides out through a flap in the net, and swims away. That small trapdoor, the turtle excluder device, is one of the biggest success stories in fisheries management, and in late August 2026 a US federal appeals court upheld the rule extending it to skimmer trawl boats 40 feet and longer. In this episode, marine biologist Andrew Lewin walks through the bycatch fixes that are working and the fights still underway. You’ll hear why North Atlantic right whales get tangled...
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The Cod Came Back: What a Fishery Collapse Teaches Us About Overfishing
How To Protect The Ocean
Five centuries ago, explorers off Newfoundland described cod so plentiful that a weighted basket lowered into the sea came back full. By July 2, 1992, so few remained that Canada shut the northern cod fishery overnight. About 30,000 people lost their work in what became the largest single layoff in Canadian history. In this first episode of a week-long sustainable seafood series, Andrew tells the story of how the collapse happened and how slowly the cod came back. Andrew then breaks down the words that cause the most confusion in fisheries headlines: overfishing, overfished, depleted, and...
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How to Choose Sustainable Seafood
How To Protect The Ocean
You want to eat seafood the right way. Then you hit the seafood counter and face a wall of labels, a sign promising “sustainable practices,” and an employee who has no idea where the tuna came from. Add documentaries like Seaspiracy telling you to quit fish entirely, and it’s tempting to give up and buy whatever looks good. Unsustainable fishing is the biggest threat to marine biodiversity, so those choices carry real weight. In this episode, Andrew’s good friend Dr. David Shiffman joins the show to talk about his new book, Why Sustainable Seafood Matters. David spent two years on the...
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Slow Down for Whales: How Global Shipping Learned to Share the Ocean
How To Protect The Ocean
Blue whales can’t dodge ships. When scientists tracked blue whales alongside cargo ships off Southern California, the whales responded in just over half the encounters, and every response was the same: a slow, shallow dive. Not once did a whale move sideways out of the ship’s path. Models suggest ships kill around 18 blue whales a year off the U.S. West Coast, nearly eight times what the population can lose and still recover. The good news is in the data. Most blue whale strike deaths happen in a small slice of ocean, and that’s where ports, air quality agencies, marine sanctuaries, and...
info_outlineBacteria that eat plastic sounds like the fix everyone's been waiting for, and Andrew gets sent videos about it constantly. So on this solo episode, following Monday's interview with Dr. Anja Brandon of Ocean Conservancy, he goes looking for the real state of the science. The short version: it's promising, it's roughly a decade of real research deep, and it is nowhere close to running at the scale the ocean plastic crisis actually needs.
The bacterium that started this whole field, Ideonella sakaiensis, was discovered breaking down PET plastic in Japan in 2016. A 2025 breakthrough from NREL, UMass Lowell, and the University of Portsmouth engineered an improved PET-degrading enzyme that cut chemical use by more than 99%, running costs by 74%, and energy use by 65%, modeling out to a cost that actually undercuts virgin plastic. It's a genuinely exciting result. It's also still lab-stage, with no commercial plant running it yet. Carbios, the French company furthest along at trying to bring enzymatic PET recycling to industrial scale, is proof of just how hard that jump is: its flagship French plant is delayed, its cash reserves have been cut by more than a third, it slashed 40% of its workforce, and it's now pivoting toward a joint venture in China that's faced its own shareholder disputes.
Then there's the other technology people call "plastic-eating," chemical recycling through pyrolysis, which isn't biological at all. It's plastic melted down with extreme heat back into oil and gas, currently handling under 1.3% of US plastic waste according to advocacy group Beyond Plastics, regulated by the EPA as a form of incineration (a classification the agency is actively trying to change as of this year), and excluded from the EU's own definition of recycling entirely. Andrew lays out where the real hope sits, where the hype outruns the evidence, and why reduce, reuse, and refuse still does more for the ocean than any of this, at least for now.
Takeaways:
- The bacterium behind the "plastic-eating bacteria" field, Ideonella sakaiensis, was discovered in Japan in 2016, and the research is real but still roughly a decade from meaningful commercial scale.
- A 2025 enzyme breakthrough from NREL, UMass Lowell, and the University of Portsmouth models out to costs that undercut virgin plastic, but it's a lab and modeling result, not a running commercial plant.
- Carbios, the company furthest along at industrial-scale enzymatic PET recycling, still can't get its flagship French plant operational and is now pivoting toward a contested joint venture in China.
- Chemical recycling (pyrolysis) is a separate, non-biological technology that melts plastic down with heat, currently handles under 1.3% of US plastic waste, and is regulated by the EPA as incineration, a classification the agency is actively trying to change in 2026.
- Advocacy group Beyond Plastics found pyrolysis facility emissions can run 10 to 100 times higher than making virgin plastic, and that multiple US pyrolysis facilities have already shut down or gone bankrupt.
- None of these technologies are close to solving ocean plastic pollution at scale right now; reducing single-use plastics at the source still does more, and that requires government leadership, not just individual habit changes.
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