Olm
Amphibian
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The olm or proteus is an aquatic salamander which is the only species in the genus Proteus of the family Proteidae and the only exclusively cave-dwelling chordate species found in Europe; the family's other extant genus is Necturus. Wikipedia
Scientific name: Proteus anguinus
Conservation status: Vulnerable (Population decreasing)
Mass: 0.6 oz (Adult)
Length: 12 inches
Class: Amphibia
Domain: Eukaryota
Family: Proteidae
Source: Encyclopedia of Life
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