The Tektite habitat at the bottom of Lamshure Bay, St John, US VI. Photo by Ed Clifton 1969. I have included this photo in the Meteor, Meteorites, and Tektites pool for obvious reasons. What might not be obvious is why it was called Tektite. This is second hand, so I apologize if I missed something:
The story behind the naming the habitat goes something like this. The original design came out of GE’s space division and someone at GE figured that it could work as an marine habitat. When working on what to name it, they came across the definition of a tektite as something from space that lands on the ocean floor.