Sinum perspectivum, common name the white baby ear, is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails.
Sinum perspectivum is found on the eastern coast of America from Maryland south to Brazil, and also round Bermuda.
The maximum recorded shell length is 51 mm. It has a shallowly coiled shell with a wide opening and graceful curved outline. It is white both outside and inside. Like the other members of its family, it is carnivorous.
Minimum recorded depth is 0 m. Maximum recorded depth is 70 m.