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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).
Tom Brakefield/Stockbyte/Getty Images. Slow-moving animals may be lethargic in their movement to conserve energy, or they may have heavy shells that hinder their movement but offer protection from predators.Slow-moving mammals are typically arboreal and feed on leaves; because their food source doesn't move, they in turn can afford to move slowly.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.