After finishing our trek on Crescent Island we boarded the boats and headed back to shore. Along the way we stopped to view some hippos sunbathing on the shore. And then when we got back to our dock there was a second group of hippos sunbathing. As we disembarked from the boats we were able to get a closer look at the hippos (with a substantial fence between us and them). Then a staff member came by to demonstrate feeding the hippos. He called the names of three or four hippos and they got up and ambled over to where we were standing. The staff person would then call a name and that hippo would hold its mouth wide open, he would then be rewarded with a pile of grass, with which he chomped down and swallowed his snack. The staff person did this with about four hippos.