What is "biribol"

Biribol is a sport, which resembles an aquatic variation of Volleyball. It has originated in Brazil, in the city of Birigüi, in the 60's by Prof. Dario Miguel Pedro. It showed up as a group game and as an alternative to the practice and the learning of swimming. It's the newest sports modality in Brazil and the only group sport genuinely Brazilian, born and instituted inside the country.