Our first pod of hippos.
Hippos, like icebergs, are mostly below the surface of the water. Most of the time only part of the head peeks out, eyes and ears and the top of the snout, and after a minute or two, the hippo slowly sinks back under water. Then another hippo slowly rises. Or maybe it's the same hippo, in a slightly different location. You can't be sure; they really do look all alike.
Up, down, up, down, like the world's slowest version of Whac-A-Mole.
Then just when you've figured they're not going to do anything worth photographing and start to put the cameras away, they start mugging for the audience.