When looking through the 980 "Herb" images at Acclaim Images.com this A Hipppatamus Swimming in Murky Water was a favorite.
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Description:
A Hipppatamus Swimming in Murky Water
Stock photo of a hippo swimming in murky water.

Some related terms for more images:
wildlife,  hippos,  african wildlife,  wild animals,  water,  hippopotamus amphibius,  herbivorous,  mammals,  submerged,  studio 33 photography,  herbivores,  river horse,  hippopotami,  african animals,  hippopotamuses,