Nebularia edentula, common name the toothless mitre, is a species of sea snail, a marine gastropod mollusc in the family Mitridae, the miters or miter snails.
The shell size varies between and . One recorded specimen had a body mass of 6.93 g and a volume of 3.96 cmó.
The shell is cylindrically fusiform (spindle-shaped). As suggested by its specific epithet edentula (meaning "toothless"), this species is known for a lack of strong columellar folds that are usually characteristic of the family Mitridae. The shell coloration typically consists of a cream or yellowish background patterned with reddish-brown spiral bands or irregular blotches.
The living animal possesses lens eyes and moves via mucus-mediated gliding.
This species is distributed in the Indo-West Pacific. Locations where it has been recorded include:
Nebularia edentula is a benthic species that lives in tropical, marine environments. It inhabits the neritic zone.
Like other members of the Mitridae, it is a carnivorous predator. The species utilizes sexual reproduction; it is a non-broadcast spawner, meaning it likely lays capsules rather than releasing eggs directly into the water column. The life cycle does not include a free-swimming trochophore stage.