Dream image, elephants and hippos in the stream....?

It was a long dream, unfortunately, I can only recall this one scene from it. I was with a group of people, and saw a stream with a high bank behind a house. There was a wide spot in the stream, and I saw a bunch of hippos and elephants playing in the water there. I excitedly called to everyone to come see, there are elephants! So everybody came over to watch. Where the elephants and hippos were playing, the stream had widened out into a pool behind the house, kind of like the banks had been built up into a pool shape with the surrounding land. In the pool where the elephants and hippos were playing, the water had become muddy. Part of the bank / dam broke down. As water was flowing out through the broken part of the dam, it changed from muddy to clear, flowing in a stream out of the pool, down the bank, and into a nearby field. We were all excited to see elephants and hippos, they just showed up out of nowhere. Any ideas? Thanks in advance for your answers...