What does endemic mean? Native or confined to a certain limited area, in other words, some things are found here that can't be found anywhere else! Endemics often develop as the result of learning how to survive in unique environments. Sometimes they get so good at special survival skills they become totally dependent and must spend their entire lives within that one habitat.
We know that most life on Earth gets its basic energy from the sun and from plant life. Caves are low energy environments with little sunlight or food sources coming in.