The Capybara is the largest living rodent in the world. It’s closest relatives are chinchillas and guinea pigs. Its common name means “master of the grasses” in the Guarani language while its scientific name, hydrochaeris, is Greek for “water hog”. Adult capybaras may grow to 130 centimetres (4.3 ft) in length, and weigh up to 65 kg (140 lb). The top recorded weight is 105.4 kg (232 lbs). And this one named Caplin Rous (pronounced rose) is quite famous in the Internet.