The Echoes of the Abyss: Toxic Legacies of Oceanic Ecologies, explores the environmental dangers caused by abandoned, unexploded munitions (UXO) lying on the ocean floor. As these munitions break down, they release toxic chemicals, polluting the water, threatening marine life, and disrupting delicate ecosystems. The project focuses on how this chemical decay changes the composition of seawater, harms biodiversity, and impacts the overall health of ocean environments. The work also highlights how acts of war and human exploitation not only shape global realities but leave lasting damage on marine ecosystems at both small and large scales. Based on research carried out in the Baltic and North Seas, the project draws on findings from scientific expeditions aboard the research vessel Tara and its network of collaborators. It delves into how decaying weapons release chemicals that alter the water’s composition and impact marine life, particularly organisms exposed to these contaminants. Acts of war and human greed are reshaping not only global realities but also Oceanic environments at micro and macro levels.