Mucous salamanders were amphibians native to the bogs of Yavin 4. They possessed the distinct ability to diffuse their molecular structures underwater, which allowed them to swim faster and pass through hunters' nets. When a mucous salamander entered dry areas, it could change its molecular structure into hardened scales for protection from predators, particularly the angler. Another name for the mucous salamander was the pinkish salamander Within his first month at Luke Skywalker's Jedi Praxeum, Jacen Solo captured a number of the creatures.