In six of eight days at the worlds, nine world marks have been broken and one equaled.
American Amanda Beard won the 200m breaststroke in 2:22.99, matching the world mark China's Qi Hui established two years ago. Australia's Leisel Jones took the silver medal in 2:24.33 and Qi claimed the bronze in 2:25.78.
Another American, Aaron Peirsol, won the gold medal in the 200 backstroke in 1:55.92, ahead of silver medalist Gordan Kozulj of Croatia (1:57.47) and bronze medalist Simon Dufour of France (1:57.90).
Also Friday, Hanna-Maria Seppala became the first Finnish woman to win a gold medal at the worlds by taking the 100m freestyle title (54.37) Jodie Henry (54.58) took silver and bronze went to eight-time Olympic champion Jenny Thompson of the US (54.65). Grant Hackett of Australia won the 800m freestyle gold (7:43.82). Larsen Jensen of the US took silver (7:48.09) and Ihor Chervynskyi of the Ukraine earned the bronze (7:53.15).