Water polo is a team sport that involves swimming. If you’re looking for the game that requires horses, you’re in the wrong place. Unless you have a horse that likes to swim, in which case why not start an equestrian water polo league? That’s how these things get started, isn’t it? Standard water polo, for example, evolved from rugby, which, following this logic, means that somebody had a team of rugby players who really enjoyed being in the water. Are you still with me?