Hippo Spa_ How Hippos clean themselves?

<p><span>And you thought the life of a hippo was all mud and muck. Why, they've got fish waiting on them hide and tail, ready and willing to scrub them squeaky - at least for hippos - clean.</span><br /><br /><span>See all National Geographic Videos:</span><br /><a class="yt-uix-redirect-link" title="http://video.nationalgeographic.com/video/?source=4001" dir="ltr" href="http://video.nationalgeographic.com/video/?source=4001" rel="nofollow" target="_blank">http://video.nationalgeographic.com/v...</a></p>