While we were there, we went on a night dive with the manta rays. It was one of
the craziest experiences I (Jennifer) have ever had. We went down to the bottom
in full darkness and knelt in a circle with our flashlights pointed towards the
surface. The light attracts plankton and the plankton attract the rays. This
picture is from a book - during our dive, it was much darker, and the rays were
much closer (we were cautioned beforehand not to touch them). The ones we saw
were about 7-10 feet across.