Hippos. (KO) A clutch of hippos hanging out in a group in a river. Hippos are so cute that people don't realize how dangerous they are. They are responsible for many human deaths every year! They turn over small boats that come near their herds and kill the occupants. Very grumpy critters! But to be fair, they have babies in this herd. A small boat could kill a baby. I'd get ugly, too, if they came near my teeny hippolet!