The previous age group mark was held by Brilliant Chua when he clocked a time of 2:27.84 at the 36th South-east Asian Age Group Swimming Championships. Dynes smashed the record by 0.84 seconds, and also took a massive three seconds off his 2:30.17 PB.
Thiruben of National Junior College came in second in 4:36.12, while Syed Hussein of Pasir Ris Secondary finished third in 4:39.84.
Cheryl Chng of Cedar Girls' Secondary bagged the silver medal in 2:40.48, while Lettitia Jules Quek of CHIJ (Toa Payoh) took home the bronze with a 2:40.89 finish.
Ismi Zakiah of Sports School took home the girls' C Division 200m gold medal with a timing of 26.26 seconds.
Singapore Sports School bagged all three medals, with Edwin Tan and Rayhan sweeping the silver and bronze in 23.29s and 23.39s respectively.
Diane Hilary Pragasam of Singapore Sports School took home the C Division 400m gold medal with a timing of 1 minute and 2.18 seconds.
Ow Yeong Wei Bin of HCI took home the gold medal with a timing of 51.76 seconds.
Bryan Ang (Jurong #10) led his team to victory with 12 points, while Leon Lee (Yishun #15) registered a game-high 15 points.
