Google announced an expansion of underwater imagery. Calling it Street View imagery is a bit silly so let's call it Sea View imagery.The expansion includes 40 new destinations around the world.
The Sea View imagery will let you virtually swim with dolphins and whales, explore reefs, and dive with sea turtles. You can find all of the Sea View imagery in the Oceans Street View collection.
Applications for Education
After exploring the Sea View imagery students have students dive deeper with Marine Explore. Marine Explore is an open data community in which scientists and others share data sets about oceans. As a member (membership is free) you can search for data sets according to location and type of data (temperatures, sea ice extent, pollution, etc).