Original description by Sowerby: C. oblongus, subcylidricus, obtusus, solidus, caeruleus, castaneo sparsim maculates, lineus nigris albo interruptis cinctus; spira obtusa, ad angulum seriatim nigropunctata, anfractibus depressis. [C. longish, not quite cylindrical, blunt, solid, bluish, speckled with chestnut brown, black lining interrupted by white girdles, spire blunt, ad the shoulder a row of dark spots, bent low.

General description of C. nigropunctatus: Average size 30 mm, the largest shell depicted herein measures 58 mm. Spire of moderate height, straight to slightly convex. Shoulders rounded. Body whorl with straight sides, slightly convex adapical. Ground colour off-white with purple-bluish or light bluish grey underground. Protoconch multispiral. Teleoconch and first whorls pink with tiny dark spots in between tubercles, hence the name. The sutural ramp slightly concave with 3-4 spiral ridges. Surface of body whorl with continuous axial striae. At the anterior third of the shell a few low, wavy spiral ridges. Some specimens show dark spots on the shoulder. Many specimens show irregularly formed dark brown or orange patches on the body whorl. The adapical part of the lower half of the last whorl with a lighter coloured band. The whole surface of the last whorl shows fine, interrupted brown spiral lining at regular intervals. The interruptions are caused by white dashes. The aperture is bluish white. The operculum is small; the smooth periostracum is yellowish brown. The form 'peledi' [an unavailable name acc. ICZN: an. 45.5] (Wils, 1971: 64) is uniformly banded with light and dark orange-brown.

C. nigropunctatus is known from the Red Sea including the Gulf of Aqaba and the Gulf of Suez. Gulf of Aden, Yemen until the Gulf of Oman; and Somalia.
Habitat: The species is piscivorous and has been collected from the low tide zone until depths of 35 m, hiding during daytime under coral rubble. Fainziiber et al. (1992: 7,15) reported it in sandy lagoons near seaweed and on the sandy outer slopes of fringing reefs, feeding on blennies during the night.