Elephants have 1-1/2-inch skin. Their loose, wrinkled skin supports their massive size. Creases and cracks trap 10 times more dirt and moisture than flat skin. The shade keeps them cool.
Elephants
Rhinos' collagen skin is 2 inches thick. Thicker skin protects them. Their skin sunburns easily. Rhinos roll in mud for sun and insect protection.
Rhinoceros
Hippos have a thin layer of fat, but their hairless, thick skin protects them. Small-caliber gunfire can't penetrate their thick skin. After being shot, they resume attacking.
Hippopotamus
Camels live in harsh deserts, thus they have thick skin to shield them from the sun. Their knees and chests have thick skin that protects them from hot sand.
Camels
Bears are dangerous and ferocious when threatened. Thick skin and hefty bodies are factors. Small firearms can't pierce a bear's hide or fur to reach its fat.
Grizzly Bear
Crocodile skin is thick and resilient, making it a top fashion leather. It's astonishing that crocodiles, strong predators with "armoured skin," have touch receptors on their skin.
Crocodile
The world's largest toothed predator is the sperm whale. 14-inch-thick skin covers their head and back. Thicker, rough skin protects these whales' blubber.
Sperm whale
Their skin regularly flakes to prevent algae and barnacle buildup. Their bristly hairs help them traverse their environs. Slow-moving manatees have thick skin for protection.
Manatees
Their 4 inch thick skin is rubbery. It protects them from sharks, killer whales, and tiger sharks. Individual sharks can be identified by the unique pattern of dots on their skin.