We booked a 4-hour tour with Captain Jose Lenin and he was easy to work with, even though he speaks little English and helped us find a driver from our resort, and cleaned and prepared our fish ceviche back at the beach. He was so accommodating to our needs!  Playa Maya is in the National Park and is approximately $4/person, which I’m not sure is mentioned.  The beach at Playa Maya is beautiful so plan to stay a while after.  We had snorkeled the day before at Playa Maya so we didn’t but went to the reef and saw so many stingrays and even a big turtle.  Selmar II also does just snorkeling trips.  It’s a place not to miss in Tulúm.  We stayed in the hotel zone and want to stay on one of the hotels here next time because the beach was better.  We did cut our trip a little short because I should have taken Dramamine and did not feel well but that’s my fault. We definitely recommend Selmar II and Captain Lenin.