Brazil has participated in all the World Aquatics Championships since the beginning in 1973.

Brazil's first World Championships medal was won by Rômulo Arantes in the Men's 100 m backstroke in West Berlin in 1978.

Ricardo Prado won the first Brazil's gold medal in Men's 400 m individual medley in Guayaquil, Ecuador in 1982.

[1] Poliana Okimoto was the first woman to win a medal, a bronze in women's 5 km in Rome in 2009.

Ana Marcela Cunha was the first woman to win a gold medal in women's 25 km in Shanghai in 2011.