Beach rugby is a sport that is based on rugby union. There is no centralized regulation of the sport as in beach soccer or beach volleyball, but leagues are common across Europe. The sport is particularly popular in Italy, in the Balkan region and in Eastern Europe. Casual games are played across the world using different sets of rules. However, organized leagues use a field that is only a fraction of the size of a standard rugby field, far fewer players on each team, shorter matches, and a simplified scoring system.

More Info: en.wikipedia.org