The Mobula munkiana, affectionately known as Munk’s devil ray, was first described in 1987 by the Italian ecologist Giuseppe Notarbartolo di Sciara and named for his scientific mentor and world renown oceanographer, Walter Munk. This short documentary by Ben Meissner was funded by the Walter Munk Foundation for the Oceans. It highlights the research and conservation efforts of Marta Diaz Palacios, a PhD Candidate at Centro Interdisciplinario de Ciencias Marinas in La Paz. For the past 6 years, her research has focused on the ecology and vulnerability of Munk’s devil ray in the Gulf of Mexico, where she works with artisanal fishermen, governmental agencies, and local community members to turn the tide for this emblematic species. Marta is co-founder of Mobula Conservation, a female research group; scientific advisor for documentary production with BBC and National Geographic; and a Walter Munk Foundation for the Oceans Fellow.