Extraterrestrial life on Neptune is uncommon in fiction, though the exceptions have ranged from humanoids to gaseous lifeforms. Neptune's largest moon Triton has also appeared in fiction, especially in the late 20th century onwards.
Extraterrestrial life on Neptune is rare in fiction, yet exceptions include humanoid and gaseous lifeforms. Triton, Neptune's largest moon, has also appeared in fiction, particularly from the late 20th century onward.