On 14 February 2001 (Valentine's Day), 34 couples from 22 countries simultaneously exchanged wedding vows 10 metres (32.8 ft) underwater near Kradan Island, Southern Thailand. This was organized by Trang Chamber of Commerce and Thai Airways International.
Only couples holding international diving licences were qualified to participate. Couples received waterproof certificates before taking off their mouthpieces and indulging themselves in an underwater kiss.
Comments below may relate to previous holders of this record.