@DelacoursLangur
Yeah, the sliders and ducks are hardly visible, but the hippos feel a little out of place. Anyway, it's a huge exhibit, and awesome in therms of naturalism. It would be very interesting if they moved the hippos to the african savanna area, wich also has a huge lagoon. That would be way more accurate; although it would be a problem to keep them among rhinos.
@Great Argus
I'm only sure about the elephants, wich are two females named "Honey" and "Bambi". I saw three hippos and three buffalos, but there could be more of both species that I didn't spot.