Please remember that even after making a reservation through the cruise , it still may be cancelled since the operator in Mexico, may want to have at least 6 people in the boat, or delay the exit to get peple from other ships, which will put you to dive in the afternoon (not good), also the time changes in Mexico 1 Hr. best option is to get the reservation directly with the dive operator.i heard that this time of the year jelly fish, wear full 3 mm wetsuit, and take gloves even if they say is not allowed