https://doi.org/10.1371/journal.pone.0183345.s001 (DOCX) Acknowledgments We acknowledge Valentina Cucchiara and Nick Poole (Liquid Jungle) and Thomas Spamberg for the use of underwater photographs of the ChanHol II site prior to the robbery of the skeleton and Ben McGeever (DiveXtras) for the permission to use diver propulsion vehicles, and we thank Carmen Rojas Sandoval and Adriana Velásquez (INAH, Tulum) for helpful discussions.
We gratefully acknowledge support of the project “Atlas Arqueológico Subacuático para el Registro, Estudio y Protección de los Cenotes en la Península de Yucatán” and “Estudio de los grupos humanos preceramicos de la costa oriental de Quintana Roo, México, a través de los contextos actualmente inundados” by the Instituto Nacional de Antropología e Historia (INAH).