The animal of the type species is quite beautiful, being semitransparent. The foot is tinged with pink or faint-lavender on the forward section, semitransparent white on the aft foot, spotted with moderately large milky-white spots and streaks. The siphon is semitransparent white, with milky white spots and streaks, which are scarce on the lower siphon, growing more dense and prominent toward the tip of the siphon. Eye stalks are transparent above eye, with a few large white spots below the eye. The known animals of Domiporta are of the large white or yellow spotted animal group. Many of the species have embryonic stages consisting of three or four glassy, pink whorls.
The radula is unlike any other mitrid group. The central and lateral rachidian plates are thin and elongate with large numbers of small cusps. On the type species the central rachidian has 10 cusps and the lateral 18-20 cusps. Other species in this group have even more numerous cusps on the rachidian plates.
Shells in this group can be easily confused with Cancilla and Subcancilla species. Domiporta species generally have less elevated spiral cords, the cords are often deeply bisected by longitudinal grooves, giving the spiral cord a segmented appearance. Cancilla species are sculptured with numerous spiral cords of different sizes, usually pustulate or nodulose in form. Subcancilla typically have spiral cords which are fused or very weakly bisected by longitudinal grooves, most species have a single interstitial thread between only a few cords.

The shells of the genus are moderate in size, 15.0-65.0 mm in length, fusiform-elongate to fusiform-ovate, with 5-10 convex whorls. Sculptured with finely nodulose spiral cords, moderately deep longitudinal cords or axial striae in interspaces. Aperture shorter or longer than spire, only moderately narrow, smooth within; outer lip moderately thin and crimped on the edge, not constricted basally, columella with 3-6 oblique folds, siphonal canal moderately short, siphonal notch distinct. Periostracum thin, straw-colored and translucent.
The radula is unique in pattern, bearing no resemblance to any other mitrid group, and is intermediate in characters between Mitra and the costellarid genus Vexillum. The buccal mass is very small, the odontophore averaging 4% of total shell-length, and containing 57-190 rows of teeth per 1 mm of ribbon-length. The rachidians have a crescent-shaped base, the denticles are small, thin and pointed and number 9-32. The shape of the laterals is similar to Mitra but the cusps are not deeply rooted as in Mitra and are small, thin and sharp instead, and number from 14-28. The egg-mass of the type species consists of a cluster of 85-90 brown, "banana'-shaped egg-capsules which contain on the average 130-150 cream-colored eggs.
The genus first appeared during Miocene times and the 10 Recent and 2 fossil species are confined to the Indo-Pacific region.