Story: Mangrove forests are natural protectors, shielding coasts from storms, sheltering species, and soaking up carbon. In 2019, when this episode originally aired, 50% of the world's mangroves had been lost. Now, 50% of the world's remaining mangroves are at risk.

Reversing the decline of these habitats isn't just a science—it's an art, says marine biologist Octavio Aburto. He uses his camera along with high-resolution satellite imagery to assess real-time changes in mangrove coverage—and to reveal the amazing hidden marine life of these critical ecosystems.