Rei & Rainha do Mar Defines The New Open Water Normal Courtesy of Patrick Winkler, Rio de Janeiro, Brazil. Patrick Winkler reported on the 2020 Rei & Rainha do Mar, "With more than 60 starts and 2,000 athletes, Rei & Rainha do Mar defined the new normal. The largest swimming event in Brazil established a trend. Rei & Rainha do Mar is the most public