Episodes

What if the fish on your plate isn’t the fish you think it is? Scientists around the world have been testing seafood from grocery stores, markets, and restaurants using DNA. The results are often surprising. Studies have found that anywhere from 10 percent to more than 30 percent of seafood products are mislabeled. In some cases, cheaper fish are sold as expensive species. In other cases, endangered fish or illegally caught seafood can enter the market under completely different names. Seafood m...

Most seafood labels look simple, but they often hide more than they reveal. When you buy fish at a grocery store, the package might say salmon, tuna, or cod. But those market names can represent dozens of different species, and the label rarely tells you exactly which one you are eating. In many cases, key details like the fishing location, the vessel that caught the fish, or the specific species are missing. In this episode of How to Protect the Ocean , we explore the seafood labeling gap and w...

Ocean microbes quietly power the planet. In this episode, we explore the microscopic organisms that regulate Earth’s climate, produce much of the oxygen we breathe, and move enormous amounts of carbon through the ocean every day. These invisible life forms are not just background players in the ocean system; they are central to how the planet works. Synthetic biology is now pushing this idea even further. Dr. José Ángel Moreno-Cabezuelo, a synthetic biologist working in Oxford, is engineering an...

Engineered microbes could transform how we fight climate change. Scientists are modifying ancient ocean microorganisms to capture carbon dioxide and produce materials using only sunlight and seawater. These tiny organisms may become living factories capable of creating fuels, plastics, and industrial chemicals without relying on fossil fuels. Cyanobacteria are at the center of this research. These photosynthetic microbes helped oxygenate the Earth billions of years ago, and now scientists are ex...

Millions of people see the damage caused by oil spills and plastic pollution, but very few know what happens beneath the surface. In the ocean, microscopic organisms begin responding almost immediately. Certain marine microbes can actually consume hydrocarbons and other pollutants, turning toxic compounds into energy. Ocean microbes play a surprising role in pollution cleanup. After the Deepwater Horizon oil spill, scientists observed massive blooms of oil degrading bacteria that rapidly multipl...

Every year, the ocean removes billions of tons of carbon dioxide from the atmosphere. Most people assume whales, mangroves, or seagrass are responsible for this massive climate service. But the largest carbon capture system on Earth is actually microscopic. In this episode of How to Protect the Ocean , we explore the biological carbon pump , a powerful process driven by ocean microbes that captures carbon at the surface and transports it deep into the ocean for centuries. These tiny organisms, i...

When people think about ocean life, they imagine whales, sharks, coral reefs, and giant kelp forests. But the vast majority of life in the ocean is invisible. In a single teaspoon of seawater, there can be millions of microbes, including bacteria, archaea, and microscopic phytoplankton. These organisms may be tiny, but collectively they regulate oxygen production, drive nutrient cycling, and influence Earth’s climate system. In this episode of How to Protect the Ocean , we explore the hidden mic...

Deep sea mining and domesticated cats do not seem like they belong in the same story… but they are. In this episode of the How to Protect the Ocean Podcast , Andrew Lewin sits down with deep-sea ecologist Dr. Andrew Thaler to explore one of the most unexpected stories in ocean science. What starts with mining minerals from the deep ocean quickly turns into a journey through ancient trade routes, maritime history, and the surprising role the ocean may have played in how cats became one of humanit...

We Know How to Protect the Ocean. So Why Aren’t We Doing It? We do not have an ocean knowledge problem. We have an implementation problem. The science behind fisheries recovery, pollution control, climate adaptation, and high seas governance is strong and repeatedly confirmed. When fishing pressure is reduced, stocks rebuild. When nutrient runoff is controlled, water quality improves. When ecosystems like mangroves and seagrass are restored, coastlines stabilize. The evidence is not unclear. The...

High Seas Treaty: Nearly half the planet lies beyond national borders, and for decades it has operated under fragmented rules and weak oversight. Now, countries have agreed to a historic global deal to protect biodiversity in international waters. It sounds like a turning point. But a signed agreement does not automatically stop illegal fishing, deep sea extraction, or weak enforcement. The real question is whether this treaty will move protection from paper to practice. BBNJ Agreement: The new ...

The ocean is no longer invisible. Satellites can now track fishing vessels across the planet in near real time. So if we can see the exploitation, what happens next? In this episode of How to Protect the Ocean , we break down how satellite monitoring, AIS tracking, radar systems, and machine learning have fundamentally changed ocean enforcement. Industrial fishing now covers more than half of the ocean’s surface. Some vessels turn off their tracking systems near marine protected areas. Others cl...

Marine protected areas now cover more than 8 percent of the global ocean. Governments announce new boundaries. Press releases celebrate historic milestones. But here is the uncomfortable truth: a line on a map does not stop illegal fishing. In this episode, we break down why enforcement, not designation, is the real driver of ocean recovery, and why many so called protected areas still struggle with noncompliance. Enforcement capacity, staffing levels, and stable funding predict ecological succe...

Nature is protected by laws on paper, but what happens when those laws are not enforced? On the high seas, beyond national borders, illegal fishing, whaling, and environmental exploitation often operate in legal gray zones. Environmental lawyer and author Sarah Levy joins the show to unpack how international ocean law actually works, where it fails, and why enforcement remains the biggest challenge in marine conservation. Law and activism collide in this deep dive into Sea Shepherd, Captain Paul...

Nature is absorbing more heat than we realize, and most of it is going into the ocean. Global ocean heat content has reached record highs, confirming what climate scientists have warned for years: the ocean has absorbed more than 90 percent of the excess heat trapped by greenhouse gases. Data from NOAA and findings summarized in the IPCC AR6 report show a continued upward trajectory, with no sign of stabilization. Ocean heat is not just a statistic. It is driving stronger marine heatwaves, coral...

Seagrass meadows may be the most powerful climate solution underwater, and almost no one is talking about them. Research published in Nature Climate Change shows that seagrass ecosystems store vast amounts of carbon in their sediments, sometimes for centuries. Unlike forests, much of this carbon is locked below ground in oxygen poor environments, reducing the risk of rapid release. But when seagrass meadows are degraded, that long-stored carbon can return to the atmosphere. A study in Science Ad...

Ocean fish populations are under pressure, and public money is still part of the problem. The World Trade Organization adopted a Fisheries Subsidies Agreement to curb harmful funding tied to illegal fishing, but major loopholes remain. Billions of dollars in government support continue to prop up industrial fleets that contribute to overcapacity and overfishing. Research published in Nature estimates that governments provide approximately 35 billion USD annually in fisheries subsidies, with the ...

Atlantic fish stocks sit at the center of a new political push to expand commercial fishing in federal waters. A recent U.S. executive action signals increased access for industrial fleets, raising critical questions about how economic policy aligns with science based fisheries management. The United States promotes its fisheries system as one of the most sustainably managed in the world, built on stock assessments, annual catch limits, and rebuilding plans overseen by NOAA Fisheries. Yet global...

Microplastics are now found in the deepest ocean trenches, Arctic ice, seafood, drinking water, and even human blood. Headlines often claim that all plastics are toxic, but what does the science actually say? Recent research has detected microplastics in human lungs, placentas, and cardiovascular tissue, raising urgent questions about inflammation, chemical exposure, and long term health risks. At the same time, scientists caution that not all plastics behave the same way, and toxicity depends o...

Marine Protected Areas are expanding faster than ever, but new research raises an uncomfortable question: are they actually protecting top predators? Satellite tracking of silky sharks shows that even inside designated protected zones, highly migratory species frequently move into heavily fished waters. If sharks cross invisible boundaries every day, how effective are those boundaries in the first place? Shark conservation and ocean governance collide when industrial fishing fleets concentrate a...

Marine Protected Areas are expanding worldwide, but new research shows that protection on paper does not always translate to protection in reality. Satellite tracking of silky sharks reveals that highly mobile predators regularly cross MPA boundaries into heavily fished waters, exposing serious enforcement gaps. When fishing fleets concentrate along invisible ocean borders, even large reserves struggle to deliver real conservation outcomes. Shark conservation and ocean governance are at the cent...

Coral Reef Recovery is happening faster than many scientists once believed possible, but only under the right conditions. Long-term monitoring from the Caribbean and Indo Pacific shows that reefs can regain coral cover and rebuild three-dimensional structure when fishing pressure is reduced, water quality improves, and protections are enforced. The idea that reefs are doomed after bleaching events is being challenged by real data collected over decades. Reef Resilience Science reveals that recov...

Coral reefs can still show living coral cover and yet be ecologically collapsing beneath the surface. In this episode, we break down new coast-to-coast reef assessments from Thailand that reveal a critical warning sign: reefs are losing structural complexity even when coral is still present. Structural complexity, also known as rugosity, is what gives reefs their three-dimensional shape. That shape creates habitat for fish, supports predator-prey balance, fuels biodiversity, and protects coastli...

Ocean-Human Health Connection is not just a theory, it is a reality unfolding beneath the surface of our coastal waters, and most people have no idea their wellbeing depends on a disappearing underwater meadow. In this episode, we explore how seagrass meadows clean the water we swim in, protect shorelines from storms, support the seafood we eat, and regulate coastal ecosystems that directly influence human health. If these habitats continue to vanish, the consequences will not stay underwater, t...

What is ethical seafood, and why does it matter if fish can suffer in the systems designed to feed the world? As seafood consumption rises globally, most people never see what happens on fish farms or how ethical decisions are made behind closed doors. This episode asks a simple but uncomfortable question: if fish feel pain and stress, what responsibility do we have when we farm and eat them? Fish welfare in aquaculture is rarely discussed in public, yet it affects hundreds of millions of animal...