Puerto Rico’s seven hundred miles of coastline are the most dynamic, biodiverse, heavily populated, and hotly contested part of the archipelago. Hurricanes beat the island from the ocean side while luxury tourist developments encroach from the land. These forces converge in the zona marítimo terrestre (ZMT), which includes littoral areas and navigable portions of waterways in which, according to Puerto Rican law, tides and the biggest waves from storms can be felt. This clunky legal term, notable for its shifting and affective dimension, has become part of everyday conversations and creative practices in contemporary Puerto Rico, but no academic study has considered its cultural significance. This article brings together insights from the fields of environmental justice and environmental humanities to propose that works of art and literature in the ZMT are autogestiones acuáticas, or independently imagined and managed shoreline activities that contest coastal displacement and articulate a decolonial sense of place within nonsovereign dynamics.