I visited Cozumel through carnival cruise and used Manta Raya divers to do my first scuba and snorkling. These guys are very knowledgeable about what they do. Fernando help me to do my scuba and snorkel for myself and my wife. They were very reasonable in pricing compared to cruise shore excursions and also provided pretty good experience. They were waiting with boat and all equipment ready while I get here. Didn't waste much of my time. I would recommend to contact them in advance if you are in short trip/cruise.
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