A steed, sure. But a talented swimmer at that. Laugh if you will, but my swimming-efficient steed and I just crushed your polo team in a bitter upset. Losing team is required by the Olympic committee to clean up the pool floor of all hoof markings, as well as other...umm..."items" horses tend to leave behind.Speaking of defeat....
*convinces Bob Saget that he needs to be on horseback in the water polo event....laughs (maniacally) with the crowd when he shows up on his steed*
*passes Nemo14 a sponge and rides off gallantly to the next event*