Osteoderms are bony structures embedded in the skin of various reptiles, amphibians, and some mammals, serving as natural armor against predators and environmental threats. Most notably found in alligators and crocodiles, these tough, mineralized plates form a protective shield along the back, reinforcing their already formidable defenses. Unlike external scales, osteoderms are part of the dermal skeleton, providing both strength and flexibility.

In alligators, osteoderms also play a crucial role in thermoregulation. Many contain blood vessel networks that help absorb and retain heat, allowing these cold-blooded reptiles to regulate body temperature efficiently. This adaptation is particularly useful for surviving in fluctuating wetland environments.

Fossil evidence shows that osteoderms have been present in crocodilian ancestors for over 200 million years, demonstrating their long-standing evolutionary success. Whether for defense, temperature control, or structural support, osteoderms remain an essential adaptation in many armored species, especially modern alligators.

This listing is for an osteoderm specimen from 1-1 ¾"