Dean's Blue Hole in Long Island, Bahamas, plunges 202 metres (663 ft) and was long considered the deepest blue hole on Earth before a deeper one was found in the South China Sea in 2016.
Record no. MRB-2026-006625
World's Deepest Known Blue Hole for Decades
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.