When the submarine plunged to about 1,500 meters below sea level, ecologist Jeff Drazen asked the pilots to cut the strobe lights that had been guiding them through the pitch-black waters. For a moment, they continued falling to the sea floor in complete darkness.
Then, the creatures of the deep sea began dazzling the crew with a striking display of bioluminescent lights, emitting signals to one another as they encountered this new strange object in their habitat.
