Ocinebrina hybrida: The shell is of moderate size (maximum length 15 mm) and roughly fusiform. The spire is high and acute, consisting of five or six sharply shouldered postnuclear whorls and a protoconch of undetermined nature. The suture is strongly impressed. The body whorl is of moderate size and fusoid. The aperture is ovate and of moderate size, with a very small, weak anal sulcus. The outer apertural lip is more or less weakly erect and coarsely serrate; its inner surface bears five weak denticles. The columellar lip is smooth and entirely adherent. The siphonal canal is rather short and fused.
The body whorl bears two or three prickly varices arising briefly at right angles to the shell surface, and several intervarical ridges of greater or lesser extent. Spiral sculpture consists of eight weak major cords, five on the body and three on the canal. These cords are somewhat stronger on the axial sculptural elements, where they are developed into very short, sharp prickles. The prickles at the shoulder margin form a crown around each whorl.
Shell color is pale waxy white-yellow to dark rust-brown. The aperture is white.

Shell up to 15 mm in length with 1.5 protoconch whorls and up to 5 spinose teleoconch whorls. Protoconch small, with few, small granules. Whorls rounded. Axial sculpture of last whorl consisting of 3-5 narrow, high, weakly spinose varices, usually with a small spine on the shoulder. Other axial sculpture occasionally of weak nodose intervarical ribs. Spiral sculpture of numerous, narrow, strong, rounded, primary and secondary cords and additional narrow threads. Aperture small, ovate. Outer lip with 5 or 6 strong denticles within. Columellar lip narrow, smooth, adherent. Siphonal canal short, sealed. Usually dark brown or blackish-brown.

Ocinebrina hybrida is one of the most easily identifiable species of Ocinebrina from Europe. The shell is not very variable and typically dark brown. The spiral cords and threads are smaller, more numerous, and more regularly shaped than in O. edwardsi and O. hispidula. However, the same shell is illustrated twice under different names in Settepassi (1977), once as Muricopsis hispidulus fasciatus Settepassi (Settepassi, 1977: 9, pl. 3, Fig. 12 C) and once as Ocinebrina hybrida (Aradas & Benoit) (Settepassi, 1977: 11, pl. 5, Fig. 74). Muricopsis hispidulus fasciatus was described as a form (in text), it is thus not a valid name. It was wrongly considered as a form of O. edwardsi in Houart (1994). Muricopsis tenellus Settepassi, 1977 was included in the synonymy of O. edwardsi by Sabelli et al (1990: 192). The description and illustration given by Settepassi are typical for hybrida. The species is apparently rare. The granules on the protoconch whorls are quite small compared to other species (O. aciculata. O. edwardsi. O. hispidula). The shell illustrated by Tenekides (1989: 38, fig 50.12) as O. hybrida is Muricopsis cevikeri Houart. 2000.

Ocinebrina hybrida: Reported only from the area around Sicily and Tunesia.

Known from a few localities such as Capraia (Italy), and Malta, although more common in the Gulf of Gabes. Tunisia (Djerba and Sfax). at 0-8 m. on Posidonia.