Prickly pear (Opuntia sp. (might be a dillenii or an stricta) Common names: nopal serrano, tuna (Español); tsakam, pak' am (Maya). Growing among young Vomitel colorado [Geiger tree] -> (Cordia sebestena) and Palma Chit (Thrinax radiata). Cactaceae (Cactus family) and maybe one of the species whose fruit I've been eating so much in my breakfast this days or leaves for salad in my lunches. Growing wild near Tulum.