algae has been known to grow on their coats according to National Geographic NatGeo algae has been known to grow on their coats algae has been known to grow on their coats sloth hail Three-Toed Sloth - National Geographic algae has been known to grow on their coats according to National Geographic algae has been known to grow on their coats NatGeo retain their grip according to National Geographic upside down in a tree according to National Geographic National Geographic- Three-Toed Sloth algae has been known to grow on their coats sloths algae has been known to grow on their coats disgusting tree-slime algae has been known to grow on their coats NatGeo algae has been known to grow on their coats algae has been known to grow on their coats algae has been known to grow on their coats Three-toed sloths sleeps up to 20 hours a day hanging upside down according to National Geographic algae has been known to grow on their coats algae has been known to grow on their coats sloths according to National Geographic algae has been known to grow on their coats Three-Toed Sloth - Animals - National Geographic algae has been known to grow on their coats on land algae has been known to grow on their coats Three-toed Sloth according to National Geographic sloths according to National Geographic Three-toed Sloth according to National Geographic according to National Geographic National Geographic sloths according to National Geographic