Diaphanoidea is a taxonomic superfamily of small sea snails, marine opisthobranch gastropod mollusks or micromollusks in the Cephalaspidea, the headshield slugs and bubble snails.

Species in this superfamily have small, flimsy, almost globular shells, known as paper bubble gastropod shells.

[1] Species in this superfamily are found in cold seas, such as the Arctic region, Antarctica, Australia, and New Zealand.

The species occur in the sublittoral to abyssal zones.

The shell is minute, thin, fragile, colorless to translucent, and usually less than 5 mm in size.