If you are new to snorkeling this is a great place in the Akumal area. It a protected lagoon so there is no surf action. Lot's of fish to see, but no coral. It is a little expensive to get in, Jan 2014 is was $14 US for adults and $10 US for kids and they do not let you bring in any food or drink. If you are staying on Half Moon bay that is fine since you have in/out privileges all day so can hop back for lower cost food.