Margarella antarctica

Margarella antarctica is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae, the top snails.

Distribution
This marine species occurs off the South Orkney Islands, the South Shetland Islands, the Antarctic Peninsula, and the Bellingshausen Sea.

Description
It is orange-yellow, with two pairs of cephalic tentacles with large black eyes. The shell is small, and wider than it is high. The orbicular, deeply umbilicated shell has an obtuse-conical shape. It contains four convex whorls, the last of which is adorned only by growth lines. The oblique aperture is sub-circular and pearly inside. In, adults its edges are joined by a callus. The operculum is polygyrous spiral. The color of the shell is bluish gray or greenish. The maximum recorded shell length is 12.5 mm.

Habitat
Minimum recorded depth is 0 m. Maximum recorded depth is 24 m.