New measurements indicate the Taam Ja' Blue Hole (TJBH), which sits in Chetumal Bay off the southeast coast of the Yucatan Peninsula, extends at least 1,380 feet (420 meters) below sea level. This is 480 feet (146 m) deeper than scientists initially documented when they first discovered the blue hole in 2021. The researchers took measurements with a conductivity, temperature and depth (CTD) profiler. These probes read and transmit water properties to