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300 People, 50 Tribes, One Meeting: How California Built Its Marine Protected Areas

How To Protect The Ocean

Release Date: 09/22/2026

How to Read the Seafood Counter Like a Marine Biologist show art 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 show art 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 show art 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 show art 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 show art 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 show art 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...

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When Whale Food Moves: Climate Change, Crab Traps, and Pop-Up Gear show art When Whale Food Moves: Climate Change, Crab Traps, and Pop-Up Gear

How To Protect The Ocean

In 2014, a patch of unusually warm water nicknamed "the blob" settled off the west coast of North America. The cold, food-rich water that normally stretches far offshore shrank into a narrow strip along the coast, and hungry humpback whales followed their food straight into the waters where Dungeness crabbers had set thousands of traps, each tied to a vertical rope. Entanglements jumped from about 10 a year to 53 in 2015 and 55 in 2016. In this episode, Andrew traces the line from warmer water to a specific whale in a specific rope. You'll learn why lunge-feeding whales depend on dense patches...

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The Whale Heart That Beats Twice a Minute show art The Whale Heart That Beats Twice a Minute

How To Protect The Ocean

Fill your hands with cold water, hold your breath, and press your face in. Your heart slows within seconds. That reflex lives in every whale in the ocean too, and in a blue whale it is pushed so far that the largest heart on Earth can drop to two beats a minute on a deep dive. In this episode, Andrew walks through the first heart rate recording from a wild blue whale, led by Jeremy Goldbogen's team at Stanford, and a study by Terrie Williams of UC Santa Cruz that tracked narwhals fleeing after release from nets in East Greenland. The narwhals swam as hard as they could while their hearts fell...

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The Biggest Mouthful: How Blue Whales Eat and Why Krill Matters show art The Biggest Mouthful: How Blue Whales Eat and Why Krill Matters

How To Protect The Ocean

A blue whale can swallow a volume of water bigger than its own body in a single gulp. That move, called lunge feeding, is one of the most extreme feats in the animal kingdom, and it only pays off when krill is packed into thick, dense swarms. In a thin patch, a blue whale gets back about six times the energy it spent. In a dense swarm, it gets back more than 200 times. In this first episode of the Age of Giants series, Andrew breaks down how rorqual whales feed, then follows the krill. In 2025, the Antarctic krill fishery hit its 620,000 tonne precautionary limit for the first time and closed...

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Whales Are Sprinters: What a Blue Whale's Heart Does When It Lunge Feeds show art Whales Are Sprinters: What a Blue Whale's Heart Does When It Lunge Feeds

How To Protect The Ocean

What happens to the heart of the largest animal on Earth when it charges into a swarm of krill? Dr. Ashley Blawas, a postdoctoral scholar in Jeremy Goldbogen's lab at Stanford's Hopkins Marine Station, joins Andrew to unpack new research published in PNAS that measured the heart rates of lunge-feeding blue whales and humpback whales using suction-cup ECG tags. Ashley explains the three phases of lunge feeding (accelerate, engulf, filter) and why these giants behave a lot like human sprinters. Their heart rates stay high after each lunge, then gradually recover while they glide and filter,...

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More Episodes

In 1999, California passed a law ordering the state to fix its patchwork of ocean parks. For two years, almost nothing happened, and two attempts to get the process moving both failed. It took a 2004 public-private partnership, roughly $35 million in public and philanthropic funding, and a decade of work before the state had a real network of marine protected areas. Partway through that decade, more than 300 people from over 50 tribal nations walked into a public meeting in Fort Bragg to protest how the process was treating their rights.

Andrew Lewin walks through what actually happened between the 1999 Marine Life Protection Act and the 124-MPA network Californians know today: the 2004 partnership with the nonprofit funder Resources Legacy Fund that finally got the process moving, the region-by-region design work built on stakeholder groups, a Science Advisory Team, and a Blue Ribbon Task Force, and the Fish and Game Commission votes that made each region official, starting with the Central Coast in 2007.

The process also shows where good intentions ran into real conflict. On California's North Coast, tribal sovereignty and traditional gathering rights were not built into the process from the start, and it took a public confrontation before the state addressed it. The North Coast's final proposal, with a formal tribal gathering exception, was not adopted until 2012, and tribal leaders accepted it with conditions rather than a full endorsement. Andrew connects this history to yesterday's conversation with Anupa Asokan about the network's ongoing adaptive management review, and explains why managing an MPA network never really finishes.

Takeaways:

  • California's Marine Life Protection Act passed in 1999 but sat mostly unused for its first two years, surviving two failed implementation attempts before a 2004 public-private partnership with the nonprofit funder Resources Legacy Fund got the process moving.
  • The full process to build California's network of marine protected areas took about a decade and roughly $35 million in public and philanthropic funding.
  • Each of the four coastal regions went through the same design steps: a stakeholder group draft, a Science Advisory Team review, a Blue Ribbon Task Force recommendation, and a final vote by the state's Fish and Game Commission. The Central Coast was designated first, in 2007.
  • The process did not build in tribal sovereignty and traditional gathering rights from the start. In July 2010, more than 300 people from over 50 tribal nations took over a Blue Ribbon Task Force meeting in Fort Bragg to protest it.
  • The North Coast region's final proposal, including a formal tribal gathering exception, was adopted in 2012, and tribal leaders accepted it with conditions rather than a full endorsement.
  • California's network now includes roughly 124 marine protected areas and recreational management areas, and it is still being managed through an ongoing adaptive process, the same one covered in yesterday's episode with Anupa Asokan.
  • Managing a network of marine protected areas does not end at designation. It requires monitoring, reassessment, and revision, and that takes sustained funding, time, and public patience.

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