Episodes

Scientists have uncovered an incredible secret hiding in plain sight on coral reefs. Some tropical sea sponges are able to harvest sunlight through microscopic algae living inside their tissues, giving them a surprising source of energy. It is a discovery that challenges what we thought we knew about one of the ocean’s oldest animals. In this episode, we explore how these ancient filter feeders use a partnership with algae to survive and thrive in nutrient-poor tropical waters. You’ll learn why ...

Sea level rise isn’t always dramatic. Long before homes disappear beneath the waves, coastal communities can lose something even more essential: safe drinking water. In this episode, we explore how saltwater is quietly moving into freshwater supplies across coastal Bangladesh and why this hidden impact deserves far more attention. Using a recent Mongabay commentary as a starting point, you’ll learn how rising seas, changing rivers, and human activities are combining to reshape one of the world’s...

The world just pledged more than $6.4 billion for ocean conservation at the 2026 Our Ocean Conference, but history tells us that big announcements do not always lead to meaningful action. In this episode, we unpack what was actually announced, who made the commitments, and why the headline number is only part of the story. You’ll learn why this year’s conference in Kenya was especially significant and what makes these commitments different from legally binding agreements. We also explore the que...

Thousands of seabirds are washing ashore along California’s coast, starving, exhausted, and unable to find enough food. While the images are heartbreaking, scientists say the birds are only the visible symptom of a much larger problem unfolding beneath the surface. In this episode, we explore why seabirds are dying and what their struggle reveals about the health of the Pacific Ocean. You’ll learn how marine heat waves are disrupting one of the world’s most productive ocean ecosystems by reducin...

Canada has admitted it is no longer on track to meet its 2030 climate targets, but the reasons go far beyond domestic politics. In this episode, we explore how changing economic priorities are reshaping Canada’s approach to climate action. The surprising twist is that many of these changes begin outside Canada’s borders. New U.S. tariffs and shifting trade policies are putting pressure on Canada’s economy, forcing leaders to rethink where to invest and what to prioritize. As economic policy chan...

Most of us will never visit the deep ocean, yet it covers the majority of our planet and supports life in ways we’re only beginning to understand. In this episode, Andrew Lewin wraps up the Surfacing Secrets series with Ocean Networks Canada by exploring why the deep sea remains one of Earth’s greatest frontiers. You’ll discover how scientists are uncovering hidden ecosystems that could reshape our understanding of the ocean. Andrew is joined by Monica Peltz of Ocean Networks Canada and Heidi Ga...

How do you protect something you barely understand? In this episode, we explore why ocean exploration is much more than discovering strange creatures or mapping the seafloor. Every marine protected area, conservation plan, and fisheries decision begins with one essential ingredient: knowledge. You’ll discover how scientists collect the information that guides conservation, from mapping underwater canyons to identifying coral gardens and sponge reefs that most people will never see. We also look ...

The deep ocean is one of the most extreme places on Earth. Crushing pressure, freezing temperatures, and total darkness make it impossible for humans to explore for long, yet scientists continue to make incredible discoveries thousands of meters below the surface. So how do they do it? In this episode, you’ll discover the remarkable technology that makes deep sea exploration possible. From remotely operated vehicles and autonomous underwater robots to multibeam sonar, artificial intelligence, an...

Most people picture the deep sea as a dark, empty place where almost nothing can survive. The truth is far more surprising. Thousands of meters below the surface lives an extraordinary world filled with ancient corals, giant sponges, glowing jellyfish, strange fish, and species that scientists are still discovering today. In this episode, you’ll learn how life has adapted to crushing pressure, freezing temperatures, and complete darkness. You’ll also discover why deep-sea ecosystems are some of ...

How can we know more about the Moon and Mars than the bottom of our own ocean? It sounds impossible, but it is true. In this episode, we begin a special series on deep ocean exploration by uncovering why so much of our planet remains a mystery and why that matters more than ever. The deep ocean plays a critical role in regulating Earth’s climate, supporting marine life, and helping sustain the ecosystems we depend on every day. Yet scientists have only explored a tiny fraction of it because of c...

What happens to marine conservation when a humanitarian crisis unfolds? In this episode of How to Protect the Ocean , we explore the remarkable story of marine scientist Mohammed Abu Daya, whose work studying endangered giant devil rays has continued despite the immense challenges of living and working in Gaza. His story reminds us that conservation is ultimately about people as much as it is about wildlife. You’ll learn why giant devil rays are among the Mediterranean’s most vulnerable species,...

For years, mangrove forests were seen as one of the world’s fastest disappearing coastal ecosystems. Cleared for development, shrimp farming, and agriculture, these unique forests seemed locked in a steady decline. But a new global study tells a much more hopeful story. Researchers have found that mangroves are recovering in many parts of the world, offering one of the most encouraging conservation success stories in recent years. In this episode, I break down why mangroves are so important for ...

A potential super El Niño is developing in the Pacific Ocean, and scientists are warning that it could have major consequences for marine ecosystems around the world. While El Niño is a natural climate pattern, stronger events can dramatically alter ocean conditions by warming surface waters and reducing the nutrients that support marine food webs. In this episode, we explore why researchers are watching this event so closely and what it could mean for the future of the ocean. One of the biggest...

After 11 years of hosting How to Protect the Ocean , I wanted to take a step back and reflect on what the journey has taught me. What started as a simple passion project became a platform for ocean storytelling, science communication, and career development. Along the way, I learned lessons about persistence, networking, and creating opportunities that I never could have predicted when I published the first episode. One of the biggest takeaways is that building a career in marine science and con...

What happens when one of the world’s most important ocean monitoring systems is nearly shut down? The Ocean Observatories Initiative (OOI) collects critical data on ocean temperatures, oxygen levels, currents, marine ecosystems, and climate change. Earlier this year, parts of the program faced significant cuts, raising concerns among scientists, policymakers, and ocean advocates. In this episode, we explore why researchers fought so hard to save the OOI, how the National Academies challenged the...

The ocean is facing some of the biggest challenges in its history. Rising temperatures, marine heatwaves, coral bleaching, habitat loss, and overfishing continue to put pressure on marine ecosystems around the world. If you only follow the headlines, it can feel like ocean conservation is losing the battle. But hidden within a recent United Nations ocean report is a surprising reason for optimism. While ocean health continues to decline in many areas, the systems designed to protect the ocean ar...

For decades, Indigenous communities were often asked whether they approved of projects happening in their territories. But a different question is now emerging: why should they not own part of those projects? In this episode of How to Protect the Ocean , Andrew Lewin looks at the shift from consultation to Indigenous ownership in ocean conservation, fisheries, infrastructure, and ocean technology. From the Mi’kmaq ownership stake in Clearwater Seafoods to the future of ocean data, monitoring, an...

Pilot whales rely on sound for nearly every aspect of their lives. They use vocalizations to communicate with family members, coordinate movements, find food, and navigate through their environment. But what happens when the ocean becomes so noisy that those sounds are drowned out? In this episode of How to Protect the Ocean , we explore new research suggesting that commercial shipping noise in the Strait of Gibraltar may be interfering with the ability of pilot whales to hear and communicate wi...

In this episode of How to Protect the Ocean, Andrew Lewin looks at the Trump administration’s move to reopen protected marine sanctuary waters to commercial fishing and asks a bigger question: who actually benefits when public ocean resources are opened up? The episode breaks down why marine protected areas matter, how fisheries recover when protections stay in place, and why local and Indigenous fishing communities may not be the ones who gain when large commercial fleets get access. Support In...

A viral underwater video of a great white shark in the Mediterranean Sea recently captured the attention of people around the world. For many viewers, the footage seemed to show a shark appearing in a place where it shouldn’t be. But the truth is much more interesting. Great white sharks have been documented in the Mediterranean for decades, yet they remain one of the most mysterious and least understood apex predators in the region. In this episode of How to Protect the Ocean, Andrew breaks dow...

Ocean conservation is often treated like an impossible problem, but the truth is simpler: when strong laws are created, enforced, and guided by science, ocean protection works. In this episode of How to Protect the Ocean, Andrew Lewin looks at the unglamorous but powerful role of legislation in ocean conservation. From Canada’s Oceans Act and marine protected areas to the U.S. Endangered Species Act, Marine Mammal Protection Act, and Magnuson-Stevens Act, this episode shows how laws can help rec...

Canada has a rare chance to become a global ocean conservation leader, but the path is not simple. In this episode of How to Protect the Ocean, Andrew Lewin breaks down Canada’s proposed $3.8 billion nature strategy, what it could mean for marine protected areas, and why ocean protection matters as development pressures grow. From pipelines and shipping to offshore oil and gas, fisheries conflicts, climate change, and Arctic access, Canada’s ocean future is being shaped right now. This episode l...

The world has now protected about 10% of the ocean, a major milestone compared to where we were a decade ago. But with the global 30x30 target aiming to protect 30% of land and ocean by 2030, the big question is whether we are protecting the right places, fast enough, and with enough enforcement to make those protections real. In this episode, Andrew breaks down why 10% ocean protection is worth celebrating, why the next 20% will be difficult, and why small coastal protected areas still matter e...

Many people feel powerless when it comes to environmental issues. Whether it's climate change, habitat destruction, or controversial development projects, it can seem like the biggest decisions are made without public input. But recent protests against proposed AI data centers are reminding us that communities still have influence when people choose to get involved. Across North America, residents have been raising concerns about water use, energy demand, environmental impacts, and transparency ...