Agagus agagus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
The umbilicate shell has a depressed conical shape with a swollen base.
Its color is a vivid white with green spots.
It contains 6½ sharp declining whorls with longitudinal oblique striae and spiral ribs.
This species occurs in the Red Sea and in the Indian Ocean off Tanzania and South Africa.