An oil slick in Guanabara Bay, the sailing venue at the Rio Olympics, is the latest pollution problem facing this summer’s Games.
Sailing crews who practiced on the waters Monday complained that the oil was turning their white boats brown, the Associated Press reports.
"We've never seen anything like this. It was all over the place," Finnish sailor Camilla Cedercreutz told AP. "There was no way you could avoid it."
Cedercreutz's sailing partner, Noora Ruskola, said other sailors told her, "Your boat looks like a toilet."
Spanish sailor Jordi Xammar added, "The boats were completely brown.