Google has added imagery from underwater exploration at Great Barrier Reef on their Maps platform.
These images are available on mobile devices as well. Google said:
We’ve added the very first underwater panoramic images to Google Maps, the next step in our quest to provide people with the most comprehensive, accurate and usable map of the world. With these vibrant and stunning photos you don’t have to be a scuba diver—or even know how to swim—to explore and experience six of the ocean’s most incredible living coral reefs. Now, anyone can become the next virtual Jacques Cousteau and dive with sea turtles, fish and manta rays in Australia, the Philippines and Hawaii.
As usual, these images are available through Google Street View project even though there are no streets under oceans!