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...
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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
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
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
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,...
info_outlineAndrew Lewin discusses a controversial incident in Australia involving a humpback whale and a swimmer. The incident has raised concerns about the impact of swim-with-whale tourism on humpback whale behavior. Join Andrew as he delves into the story and explores potential actions that could be taken, possibly starting with government intervention.
Tune in to learn more about protecting our oceans and how you can make a difference.
Links:
Contact the Queensland Department of Environment, Science, and Innovation:
https://www.desi.qld.gov.au/contactus
Queensland Rules around whale watching: https://environment.desi.qld.gov.au/wildlife/animals/living-with/watching-marine-mammals/rules
Stephanie Stack's TikTok Video: https://www.tiktok.com/@whalescientist/video/7409906978316930350
Sign Up for Updates on the process: www.speakupforblue.com/oceanapp
Connect with Speak Up For Blue:
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YouTube: www.speakupforblue.com/youtube
Regulations and enforcement in the swim-with-whale tourism industry are crucial for protecting humpback whales and ensuring tourist safety. The incident discussed in the podcast episode highlighted the potential dangers of close interactions between humans and humpback whales during swim tours. The humpback whale carrying a person out of the water demonstrated the unpredictability of these interactions and the need for stricter regulations.
The episode emphasized the importance of establishing clear guidelines and rules for swim-with-whale activities to prevent disturbances to humpback whales. Research conducted by ecologists, including Stephanie Stack, indicated that the behavior of humpback whales was significantly altered during swim tours, leading to disruptions in their resting patterns and overall behavior. These disturbances could have negative implications for the well-being of the whale population and the sustainability of marine tourism.
To address these concerns, it was suggested that the Queensland government should implement stronger regulations and enforcement measures for swim-with-whale tours. Currently, there appears to be a lack of specific laws governing these activities, leaving room for operators to potentially overlook important safety and conservation protocols. Strengthening regulations would not only protect humpback whales from potential harm but also ensure the safety of tourists participating in these immersive experiences.
Furthermore, the episode highlighted the need for collaboration between whale-watching companies, scientific researchers, and conservationists to develop comprehensive codes of conduct for swim-with-whale tours. By establishing industry-wide standards and promoting adherence to these guidelines, operators can minimize disruptions to humpback whales and create a safer environment for both the animals and tourists.
In conclusion, the podcast episode underscored the urgency of enhancing regulations and enforcement in the swim-with-whale tourism industry to safeguard humpback whales and promote responsible marine tourism practices. By prioritizing the well-being of these majestic creatures and implementing stringent guidelines, stakeholders can work towards creating a sustainable and ethical environment for human-wildlife interactions in the marine realm.
Humpback whales can be disturbed by human interactions, impacting their behavior and potentially affecting their population recovery. The episode highlights an incident in Australia where a humpback whale carried a person out of the water during a swim-with-whale tourism activity. This interaction, although seemingly harmless as the person was unharmed, can have significant consequences for the whales.
Research conducted by ecologists, including Stephanie Stack, has shown that commercial swimming with whale tours can lead to disturbances in humpback whale behavior. The study found that the whales made direct changes when swimmers were in the water, and the whales did not resume undisturbed behavior even after the swimmers exited the water. This disruption can have negative implications for the whales, especially since humpback whales are capital breeders with limited energy reserves.
Furthermore, the study revealed a 50% reduction in the proportion of time that whales spent resting during swim tours compared to whale watch tours. This reduction in resting time can impact the overall health and well-being of the humpback whale population. It is crucial to minimize disturbances to humpback whales to ensure their continued population recovery and the sustainability of the marine tourism industry.
The episode emphasizes the need for robust education, enforcement programs, and continued monitoring of humpback whale populations to mitigate the impacts of human interactions. Regulations and enforcement of these rules are essential to protect humpback whales from disturbances caused by swim-with-whale activities. By understanding and addressing the potential negative effects of human interactions on humpback whales, we can work towards ensuring the conservation and recovery of this species.
Collaboration between operators, scientists, and government officials is crucial for the development and implementation of effective regulations for swim-with-whale tours. In the podcast episode, it was highlighted that the incident involving a humpback whale carrying a person out of the water raised concerns about the impact of swim-with-whale tourism on humpback whale behavior.
Stephanie Stack, a researcher studying whale tourism impacts, emphasized the need for robust education, enforcement programs, and continued monitoring of population dynamics through scientific research to minimize negative impacts on humpback whales. She conducted a study in Hervey Bay where the whale-watching fleet developed their own code of conduct for swim tours, indicating a proactive approach by operators in response to research findings.
The episode also mentioned the importance of strengthening and enforcing existing regulations to ensure the safety of both humans and whales during these interactions. It was noted that while regulations exist, there is a need for additional rules to address specific scenarios, such as maintaining adequate distances and respecting whale resting times.
By fostering collaboration among operators, scientists, and government officials, a comprehensive set of regulations can be developed that considers the well-being of humpback whales and the safety of tourists. Operators can benefit from scientific insights to enhance their practices, while government officials can ensure that regulations are effectively enforced to protect marine wildlife.
Overall, the episode underscores the significance of multi-stakeholder collaboration in creating sustainable and responsible swim-with-whale tours. By working together, these parties can address the challenges posed by such activities and strive towards a harmonious coexistence between humans and humpback whales in their natural habitat.