noun
olm; Proteus anguinus
A cave-dwelling aquatic salamander native to southeastern Europe. The cross-reference 洞井守 (ほらあなもり) is a rare Japanese name for this animal.
See also: 洞井守
オルムは洞窟に生息する盲目の両生類です。
The olm is a blind amphibian that lives in caves.