The aquathon is a co-ed event which is held during Term 3. Schools participate in either the ‘Island’ or the ‘Kowloon’ event before competing in the HKPSSA Championships which is held at KGV. Teams consist of 3 boys and 3 girls with each participant simultaneously swimming 250m followed immediately by a 1 km run. Times from each member of the team are added together. The team with the lowest combined time is declared the champion.