Night Diving with the Manta Rays of Kona, Hawaii. Underwater video of these magnificient animals as they swoop and swim among divers as the Mantas feed on tiny plankton drawn by the underwater lights. It's an incredibly beautiful ocean ballet starring some of the Earth's most graceful creatures. Interviews with Manta specialists Keller Laros and Kara Osada describe the world of these animals, the threats to the future of Mantas, and what can be done to help them.