A few water hogs were seen enjoying an open-air hot bath at the Izu Cactus Zoological Park, southwest of Tokyo, December 1, 2019. /VCG Photo

The animals soaked themselves in a citrus-filled pool with eyes half closed, enjoying local hot springs. /VCG Photo

The zoo includes a variety of up to 140 different animal species from peacocks to squirrel monkeys, which are allowed to roam freely. /VCG Photo

Also known as capybara, the water hogs are close relatives to rats, which makes these animals at the zoo a wildly popular attraction since the coming Lunar New Year is the Year of the Rat in the Chinese zodiac. /VCG Photo