Google Maps introduces Underwater Maps

"From the Great Barrier Reef to Hanauma Bay you can dive underwater with Street View. In partnership with the Catlin Seaview Survey you can swim with sea turtles, schools of fish and even manta rays! Read more on our Lat Long blog: http://goo.gl/XqqSe

Or see these spots on http://maps.google.com/ocean"

source:Google Maps