In Crocodilians, Ancient Apex Predators, evolutionary biologist Ben Garrod meets some crocodilians. This category includes crocodiles, alligators, and other similar species that use their sensitive skin to detect pressure and vibrations, especially in murky waters where their vision is limited. This unique adaptation helps them hunt and survive as an apex predator. This video is excerpted from Secrets of Skin, a documentary series exploring the natural history of the body’s largest organ.