Walking Sharks Explained: A PhD Candidate's Path to a New Species
Beyond Jaws: Exploring Shark Science and Conservation
Release Date: 08/11/2026
Walking Sharks Explained: A PhD Candidate's Path to a New Species
Beyond Jaws: Exploring Shark Science and Conservation
Walking sharks are one of the strangest small predators on the reef: pectoral fins built for crawling across coral flats at low tide, distributions so narrow some species live in a single bay, and a family tree that's still being filled in. In this episode, Andrew Lewin and Dr. David Ebert are joined by Jess Blakeway, a PhD candidate at the University of the Sunshine Coast, whose research on the distribution, ecology, and biology of walking sharks (genus Hemiscyllium) in Papua New Guinea has already led to a new species discovery. Jess walks through her path from volunteering with sea turtles...
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Inside Shark Week 2026: Jesse Colaizzi on Alien Sharks Untamed America
Beyond Jaws: Exploring Shark Science and Conservation
It's Shark Week season again, and Andrew Lewin and Dr. David Ebert are joined for the third year running by Jesse Colaizzi, an award-winning television documentary producer, senior editor, and director of photography who works closely with Forrest Galante. Jesse pulls back the curtain on how a Shark Week episode actually comes together, from scouting locations to the final cut. Jesse joins the show remotely from Gujarat, India, where he is showrunning and editing Vantara's Sanctuary Stories, before turning to his newest project, Alien Sharks: Untamed America, premiering Wednesday, July 29th on...
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She Spent Years Tracking Sharks in Crocodile-Infested Rivers
Beyond Jaws: Exploring Shark Science and Conservation
Dr. Julia Constance is back on Beyond Jaws, and this time she's joining hosts Andrew Lewin and Dr. David Ebert as Dr. Constance. Julia returns fresh off completing her PhD on the natural mortality and movement ecology of two of the world's least understood sharks: the speartooth shark and the northern river shark, both found almost nowhere outside northern Australia and southern Papua New Guinea. Using a long-running acoustic telemetry dataset built by her supervisor since 2013, Julia tracked around 200 tagged sharks across Northern Territory river systems, some for up to a decade, to...
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What Does a Camera Have to Do With Saving Sharks?
Beyond Jaws: Exploring Shark Science and Conservation
For decades, stunning shark photographs have shaped the way millions of people think about these misunderstood predators. But behind every unforgettable image is a story that rarely gets told. In this episode of Beyond Jaws, we sit down with Manique Fallows to explore the passion, patience, and purpose behind a life dedicated to sharks. Monique shares how photography became more than a way to capture wildlife. It became a powerful tool for conservation, storytelling, and helping people connect with animals they often fear. We also talk about her work as an author, her experiences in the field,...
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What a 5-Week Shark Trip Revealed About the Future of Shark Science and Conservation
Beyond Jaws: Exploring Shark Science and Conservation
Dave Ebert returns from a five-week journey across South Africa, Sri Lanka, and the Maldives, sharing stories from shark research, Sharks International, mentoring young scientists, and the search for lost sharks. This episode explores why taxonomy still matters, how new shark and ray species are still being discovered, and why the future of shark science depends on training the next generation. Shark science, shark conservation, Beyond Jaws, Dave Ebert, lost sharks, new shark species, guitarfish, South Africa sharks, Sri Lanka sharks, Sharks International, marine biology, ocean science, shark...
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How Do You Build an Ocean Career When You Live Inland?
Beyond Jaws: Exploring Shark Science and Conservation
Ocean careers rarely follow a straight line. In this episode of How to Protect the Ocean, Dave Ebert takes over the host chair to interview Andrew Lewin about his career journey, from marine biology and consulting to podcasting, science communication, and his new role as Ocean Communications Manager with Pisces Ocean. Andrew shares how choosing family, living away from the coast, and building a podcast over many years helped shape a different kind of ocean career. The episode explores why storytelling matters in marine conservation, how podcasting can build real professional networks, and why...
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Are Orcas Really to Blame for the Missing Great Whites?
Beyond Jaws: Exploring Shark Science and Conservation
Great white sharks have disappeared from some of South Africa’s most famous shark hotspots, but the reason may not be as simple as the popular story suggests. In this episode, Chris Fallows returns to talk about orcas, white sharks, shark nets, longline fisheries, and the uncomfortable possibility that humans played a much larger role than many people want to admit. This conversation looks beyond the headline of orcas hunting great whites and asks a harder question: what happens when we focus on the predator we cannot control while ignoring the human systems we can? From False Bay to...
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The Big Question at Sharks International 2026: Are We Saving Sharks the Right Way?
Beyond Jaws: Exploring Shark Science and Conservation
Ocean Conservation feels like it’s everywhere, but are we actually making a difference, or just telling ourselves we are? In this episode, we break down what really works in ocean protection and why so many well-intentioned efforts fall short. If you care about the ocean but feel overwhelmed by conflicting messages, this conversation will help you cut through the noise and focus on what truly matters. Marine Science meets real-world impact as Daniel Fernando shares lessons from the field, including the challenges of balancing conservation with human needs. From working with communities to...
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She Built Shark Science Where Almost Nobody Was Looking
Beyond Jaws: Exploring Shark Science and Conservation
Shark Conservation What happens when an entire coastline is full of species we barely understand, and almost no one is studying them? In this episode of Beyond Jaws, we speak with Ghofrane Labyedh, a rising shark scientist originally from Tunisia who is helping build shark and ray research in Cameroon. You’ll hear how she entered marine science, why West Africa remains one of the least understood regions for sharks and rays, and what it takes to create science where little existed before. Marine Biology Careers Ghofrane shares the realities of doing fieldwork, building trust with local...
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She Didn’t Plan to Study Sharks, Then Everything Changed in the Bay of Bengal
Beyond Jaws: Exploring Shark Science and Conservation
Shark Conservation What happens when one unexpected opportunity completely changes your career path, and why does that matter for the future of sharks? In this episode of the Beyond Jaws podcast, Zoya Tyabji shares how her journey began in island conservation work and led her into the world of shark and ray research in India. You’ll hear how curiosity, timing, and taking risks opened doors she never expected. Shark Research India Zoya explains the hidden realities of shark fisheries, trade, and conservation challenges in one of the world’s most important marine regions. Her work combines...
info_outlineWalking sharks are one of the strangest small predators on the reef: pectoral fins built for crawling across coral flats at low tide, distributions so narrow some species live in a single bay, and a family tree that's still being filled in. In this episode, Andrew Lewin and Dr. David Ebert are joined by Jess Blakeway, a PhD candidate at the University of the Sunshine Coast, whose research on the distribution, ecology, and biology of walking sharks (genus Hemiscyllium) in Papua New Guinea has already led to a new species discovery.
Jess walks through her path from volunteering with sea turtles in PNG to noticing a walking shark outside its known range, emailing shark scientist Christine Dudgeon out of the blue, and eventually joining her as a PhD student. That relationship led to the description of Hemiscyllium dudgeonae, or Dudgeon's walking shark, named in honor of her supervisor. Jess and the hosts also dig into why these sharks have such tiny, non-overlapping ranges, how researchers tell nearly identical-looking species apart using color pattern, genetics, and geography, and the ongoing mix-up between "zebra sharks" and "leopard sharks," which turn out to be the same animal at different life stages.
It's a fun, detail-rich conversation about what it actually looks like to find a new species in the field, what happens after that moment (specimen collection, museum deposits, taxonomic description), and what Jess has planned for her postdoc research.
Takeaways:
- Papua New Guinea and northern Australia are home to all 10 known species of walking shark, each with a highly restricted range shaped by deep-water barriers, freshwater outflows, and shallow-water habitat limits.
- Jess Blakeway co-described Hemiscyllium dudgeonae, a newly recognized walking shark species named after her supervisor Christine Dudgeon.
- Because walking sharks look nearly identical morphologically, researchers rely on color pattern, genetics, and geography, not body shape, to tell species apart.
- Zebra sharks and leopard sharks are the same species (Stegostoma tigrinum): striped as juveniles, spotted as adults.
- Some walking shark distributions overlap without the species actually co-occurring, raising open questions about how isolation and reef geography shaped their evolution.
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