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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).
Playing the Heavy. Turtles and tortoises are generally slow-moving reptiles, in part due to the heavy shells that they carry around. These creatures have slow metabolisms to match their slow movement and can live for more than 100 years.ollusks and Sea Creatures. Many of the 50,000 known mollusk species are slow movers. The gastropods -- among them snails, slugs and limpets -- creep around on a stomach foot, a muscular projection from their ventral side.