Mixed gas rebreathers allowed divers to explore the shelf edge of the Bermuda sea mount at depths from 60 to 136 m to search for potential refugia for anchialine taxa during Pleistocene periods of sea level regression. Divers discovered karst and sea level features including a remnant natural bridge cave, drowned coral reefs, wave-cut notches and high relief escarpments.

{"references": ["ILIFFE, T.M., KVITEK, R., BLASCO, S., BLASCO, K. & COVILL, R., 2011: Search for Bermuda's deep water caves. Hydrobiologia 677(1), 157-168.", "NEUMANN, A.C., 1966: Observations on coastal erosion in Bermuda and measurements of the boring rate of the sponge, Cliona lampa. Limnology and Oceanography 11(1), 92-108."]}