Wendy and Lola the Pygmy Hippos in their pool at Marwell Wildlife, 19 April

that water is seriously disgusting!...but hippos are pretty dirty anyway..

Indeed, if that had been cleaned two hours before it would still look like this.

Exactly the point. The pools are cleaned reguarly, but it's rare to see them so pristine cos the hippos soon lift their tails to set them to how they like it! Much like my dog really, loves a muddy puddle but hates it clean.