Capybara

The capybara (Hydrochoerus hydrochaeris) is a large cavy-family rodent living along rivers, lakes and wetlands throughout South America except Chile, and the largest living rodent. Semi-aquatic and a superb swimmer, it can hold its breath underwater for up to five minutes. It is herbivorous, grazing mainly on grasses and aquatic plants with some fruit and bark. Highly social, it lives in groups of 10-20 and sometimes up to 100. It is docile and often allows people to pet and hand-feed it, though direct contact is discouraged because its ticks can carry Rocky Mountain spotted fever. Private keeping requires a group of at least two, a pool deep enough to submerge, a large paddock, abundant hay to wear down the teeth, and heating in winter as it is cold-sensitive. IUCN Least Concern, not CITES-listed and not a Japanese specified animal. Imports fall under the rodent notification system of the Infectious Diseases Control Act; in Japan captive-bred animals occasionally circulate through exotic dealers and farms.

Source: Wikipedia (CC BY-SA 4.0)

The Capybara lives About 4 years in the wild, up to 12 in captivity.

Predation limits wild lifespan to about four years, but captive animals live up to 12.

The Capybara grows to 106-134cm body (50-62cm at withers) / 35-66kg.

Head-body length 106-134 cm, shoulder height 50-62 cm, weight typically 35-66 kg (average 48.9 kg in the Venezuelan Llanos).