"According to several web sites the snake is an Australian Olive Whipsnake, Demansia olivacea, and is rather venomous."
"Three marine turtle species occur within the coastal area, namely: green turtle Chelonia midas (EN), hawksbill turtle Eretmochelys imbricata (CR), and olive ridley turtle Lepidochelys olivacea (EN)."
"During mating season, over 250,000 turtles nest on the Naranjo and Nancite beaches, the majority of them being the Olive Ridley turtle (Lepidochelys olivacea)."