Just got finished with the night snorkeling trip with manta rays. WOW! What an absolutely awesome experience. The staff was courteous and extremely helpful. They explain what to expect and what you may encounter, but it is beyond words.
We were outfitted with snorkeling equipment and wetsuits, hopped in the boat and were taken to a point that has several HUGE manata rays. After getting in the water, you hang on to a modified surf board outfitted with LED lights to attract plankton. The manta rays are gliding around effortlessly, coming within inches of you, swirling around doing loops as they eat the plankton. Several times the rays were almost brushing up against us. The rays ranged in sized from 10-15 feet wide.
The trip concluded with a ride back to were we started. If I had one complaint, it would be the parking. Not enough spots for all the tours that leave from that ramp. Highly recommend this trip and this company.