The California slender salamander, Batrachoseps attenuatus, the most common salamander in the state, turns out to be 20 separate species spread out along the coast from Oregon to Mexico.
From the sciencedaily.com
Stream-dwelling salamanders, such as Caucasian Salamander or Gold-striped salamander have very slender, long bodies, perfectly adapted to life at the banks of fast small rivers and mountain brooks.