When traveling to Big Island, you have A LOT of choices when it comes to diving and snorkeling with the manta rays. Friends had advised us to do a manta ray dive, but my husband is not PADI certified. So he looked into a snorkeling adventure that would still give us a great experience with seeing manta rays. He found Manta Adventures by reading reviews, and they were good. And, they did not disappoint. First, friendly and welcoming. We arrived at the time they requested so we could get sized for our wet suits by Shawna. Second, Captain Bill gave us the run down of boarding the boat, safety and what to expect. Third, we had some water and pineapple to snack on while getting out to the snorkel location (which ends up being not far from the airport). Fourth, we got a walk through the manta rays that tend to make regular appearances in this area... like Big Bertha, a manta ray over 15 feet wide! Fifth, during that time, you get to know your fellow snorkelers... which was great. Then sixth, after waiting for dusk and the lights turned on to attract the plankton, we got in the water on a "snorkel board" and waited for the action. We had about 50 minutes in the water, and oh what a show it was. We are told that Big Island is the ONLY place where the manta rays do the barrel rolls to feed on the plankton... and they were rolling right in front of our faces! It was a fantastic experience all the way around. I'd highly recommend this company for the manta ray snorkel. And, if we are ever back on Big Island, I'd snorkel with them again. Our trip with them was May 31, 2018.