They kill more people in Africa than any predator, and now they're hitting the capybaras:
GULF BREEZE, Fla. - A Capybara at a Florida Panhandle zoo died after it was attacked by an adult hippopotamus, zoo officials said Thursday.
The Capybara, a large aquatic rodent, died last week at The Zoo Northwest Florida, just a month after a baby hippo was fatally attacked by an adult hippo.
Fortunately, they're not nearly as dangerous in zoos as gorillas. I guess they shouldn't assume the giant rodents can look out for themselves, though.