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 along MPA borders and enforcement resources struggle to keep up. Studies reveal that some protected areas allow extractive activities, while others lack the monitoring capacity needed to deter illegal or unregulated fishing. The result: declining shark populations in places that are supposed to be safe havens.

Ocean science and policy must align if marine protection is going to work. This episode examines the silky shark case, border fishing pressure, enforcement gaps, and the growing debate over whether some MPAs are delivering real conservation outcomes or simply drawing lines on a map.

Follow the show to stay informed on the science shaping the future of our ocean.

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