CEBU CITY, Philippines — At a coffee meeting in 2007, Philippine environmental lawyer Rose Liza Eisma-Osorio and four other law professors in Cebu City sat laughing at an idea: representing marine mammals in court. Despite their laughter, they were dead serious about their goal: Stop the oil exploration led by Japan Petroleum Exploration (JAPEX) in Tañon Strait. The protected seascape between the islands of Cebu and Negros in the central Philippines is home to 14 whale and dolphin species, as well as coral reefs and mangrove forests, according to advocacy group Oceana. In 2007, the Japanese energy company performed seismic surveys and drilled an exploration well in the strait, driving away cetaceans. It was an ambitious plan, as animals had never been named as petitioners. Eisma-Osorio and fellow lawyer Gloria “Golly” Estenzo Ramos filed the first petition representing the resident marine mammals in December 2007. Their colleagues filed a second petition on behalf of the fishing communities who had been directly affected by the exploration activities. The case, Resident Marine Mammals of the Protected Seascape Tañon Strait v. Secretary Angelo Reyes, went on for several years. In April 2015, the Philippine Supreme Court ruled to void the contract that allowed the exploration, development and exploitation of petroleum resources within the Tañon Strait. Eisma-Osorio joined Oceana Philippines as a consultant in 2015, a year after the NGO was established. At 56, she now leads the campaign and legal departments as senior director of Oceana Philippines. On Oct. 24, 2025, a major…This article was originally published on Mongabay

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