Belek, due to its long history of dense human population, has a biodiversity that is limited to species capable of adapting to human life and small habitats. It is known that nearly 200 vertebrate species inhabit this region. Among these are 38 mammals, 88 birds, 31 reptiles, 5 amphibians, 38 fish, and 51 notable invertebrate species. Along the Belek coastline, animals such as foxes, weasels, squirrels, and hedgehogs are frequently observed. Belek is also one of the best areas for birdwatching, hosting many bird species that overwinter and breed here. Additionally, rare reptiles like chameleons, sea turtles, land turtles, and freshwater turtles live freely within Belek's natural habitats.
Two of the five sea turtle species found in the Mediterranean, Caretta caretta (loggerhead sea turtle, native to the Atlantic Ocean) and Chelonia mydas (green sea turtle), use 17 beaches along the Antalya coastline as nesting grounds. Beaches in Belek, Kaş, Manavgat, Tekirova, Çıralı, Olympos, Adrasan, Kumluca, and Kale (Demre) are primary nesting sites for these sea turtles.
