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Giant Tortoise â The giant tortoise is the worldâs slowest reptile and one of the slowest animals in the world. But with a life span of 190 years, heâs not in a rush. And besides, youâd move slow too if you weigh as much as 300 kg (660 lbs). Slowest Animals In The World: Giant Tortoise (source: wiki).5. Koala Bear â The Koala bears are native to Australia, and like the sloths â they are both very cute and very slow.iant Tortoise â The giant tortoise is the worldâs slowest reptile and one of the slowest animals in the world. But with a life span of 190 years, heâs not in a rush. And besides, youâd move slow too if you weigh as much as 300 kg (660 lbs). Slowest Animals In The World: Giant Tortoise (source: wiki).
The sloth is the slowest mammal on Earth. It takes a month for a sloth to move 1 kilometer! Sloths are arboreal animals, which means that they spend most of their lives hanging upside-down from tree branches. They eat, sleep, mate, and give birth upside-down in the trees.