Echidnas are Australian egg-laying mammals also known as spiny anteaters.
Echidna may also refer to:
- Echidna (mythology), monster in Greek mythology and eponym of the mammal
- (42355) Typhon I Echidna, the natural satellite of the asteroid 42355 Typhon
- ECHIDNA, high-resolution neutron powder diffractometer at Australia's research reactor OPAL
- Echidna (Re:Zero), a character in the light novel series Re:Zero − Starting Life in Another World
- Echidna, character in the video game The Bouncer
- Echidna (Devil May Cry), a demoness in the video game Devil May Cry 4
Taxonomic genera
- Echidna (fish) , a genus of moray eels
- Echidna , a junior homonym referring to the mammals commonly known as echidnas
- Echidna , junior homonym for a genus of African snakes now treated as Bitis
See also
- Knuckles the Echidna, character from the Sonic the Hedgehog video game series
- Echidna Parass, fictional character from the Black Cat series