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.

[1] 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.

[2] It has a shallowly coiled shell with a wide opening and graceful curved outline.

Like the other members of its family, it is carnivorous.