Zeidora naufraga is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.

The white shell is delicate, depressed, oblong, pointed behind, with a minute short apex, rounded and cleft in front, with a broad flat keel bearing the old cleft-scar and extending the whole length of the shell.

Sculpture: Longitudinals, from the apex to the cleft across the middle of the back runs a broad raised keel, flat on the top, where it is scored by the minute, delicate, sharp, prominent, close-set, but not contiguous scars of the old cleft.

Spirals, strictly speaking, there are none, but the whole surface is scored at right angles to the longitudinals with a series of threadlets, very similar in form, but rather more closely set.

Behind, it is peculiarly patulous, being markedly bent outwards from the line of attachment of the septum, this bending being strongly shown on the outside of the shell.