Carenzia carinata is a species of sea snail, a marine gastropod mollusk in the family Seguenziidae.

The shell thin, transparent, glossy, but not nacreous forms a depressed cone.

The shell has a thread-like spiral rib below the rather deep suture of each whorl (varying in position), numerous but slight flexuous striae below the rib, and in some specimens minute close-set curved longitudinal striae on the upper whorls.

The umbilicus is narrow but deep, exposing all the whorls, encircled and defined by a slight rib.

[3][4] This species occurs on both sides of the Atlantic Ocean off Florida, USA - Brazil, the Azores, Northwest Africa and the Cape Verdes.