Thalotia conica, common name the conical top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

The spire is pinkish or grayish white with a crimson apex and numerous close longitudinal dark reddish-brown stripes, often cut into tessellations by the spiral grooves of the surface.

The body whorl is dark-purple, with oblique, more or less zig-zag pale lines.

The straight columella is denticulate, ending abruptly in a strong basal truncation.

This species is rather variable in sculpture; the spaces between the spiral ribs are often occupied by lirulae[4][5] This marine shell occurs off Southwest Australia to New South Wales and off Tasmania