Akumal is a small beach-front tourist resort community in Mexico, 100 km south of Cancún, between the towns of Playa del Carmen and Tulum. Akumal has recently been declared a Marine refuge for protected species.
In Akumal, head for Half Moon Bay where you can spend the day snorkelling with turtles that feed on sea grass in the sheltered bay. You can safely head to the coral reef and snorkel along with snappers, jacks, sting rays and angelfish.
See full post here : Akumal & Yalku