Tricolia tenuis

Tricolia tenuis is a species of sea snail, a marine gastropod mollusk in the family Phasianellidae.

Description
The size of the shell varies between 6 mm and 11 mm. The oval, elongated shell is rather thin, and shining. The elevated spire has a conic shape. It is composed of 4–5 somewhat convex whorls, separated by slightly impressed sutures. The aperture is rounded oval. The columella is arcuate. The color of the shell is yellowish or rose, with red and white flammules and decurrent lines, sometimes punctate with red.

Distribution
This marine species occurs in the Mediterranean Sea, the Black Sea; in the Atlantic Ocean off the Azores, Cape Verde Islands and West Africa.