NAY PYI TAW, Dec. 12 (Xinhua) -- The aquatic sport started on Thursday evening in the swimming pool of Nay Pyi Taw's Wunna Theikdi Sports Complex, with the record of the women's 200m individual medley of the Games was broken by Vietnam's Nguyen Thianh Vien.

Vien swam through the water to reach the destination by 2 minute and 14.80 seconds, which surpasses 2:15.73 previous record.

Swimmers from eight contestants of Vietnam, Thailand, Singapore, Indonesia, and Malaysia etc., competed in the individual melody event, with nine countries except Timor Leste and Brunei participate in five-day swimming event.

Singapore, Malaysia, Philippines and Vietnam are the main rivals to vie for golds while Indonesia are the late bloomers.

The 27th Southeast Asia (SEA) Games comprises 33 sports that award 460 golds, 460 silvers, and 637 bronze medals to the winners.

The Games is held from 11 to 22 December in four different places, namely Nay Pyi Taw, Yangon, Mandalay and Nge Saung beach in Pathein with the theme of 'Green, Clean, and Friendship'.

Over 6000 athletes and officials from 11 ASEAN countries and regions participate in the biggest biennial tournament of the region.