There are more than 150 inland limestone caves in Bermuda most on which are connected to the sea.

These inland caves are a largely unexplored and unique ecosystem inhabited by eyeless and colorless invertebrates that are true “living fossils”, resembling organisms only found in deep-sea waters.

NOAA Ocean Explorer will be exploring these November 30 – December 31, 2009

http://oceanexplorer.noaa.gov/explorations/09bermuda/welcome.html