Eulithidium affine, common name the polka-dot pheasant or the spotted pheasant, is a species of sea snail, a marine gastropod mollusk in the family Phasianellidae.

The elongate shell has a pointed ovate shape.

The columella has a white callus which is somewhat distended at the slightly impressed and grooved subperforate or imperforate umbilical region.

The color of the shell is white, yellow or pale rose, more or less clouded longitudinally with rose, orange or brown, sometimes only with subsutural and peripheral series of short flammules, the entire surface closely and regularly punctate with pink or orange, and white.

[3] This species occurs in the Gulf of Mexico, the Caribbean Sea and the Lesser Antilles; in the Atlantic Ocean off Brazil.