Tritia senegalensis is a species of small sea snail, a marine gastropod mollusc in the family Nassariidae, the dog whelks or nassa mud snails.
The length off the shell varies between 8 mm and 9 mm, its diameter between 5 mm and 5.5 mm.
(Original description in Latin) It differs from the Mediterranean type by a smaller, thinner shell, more convex whorls, a much less expanded aperture callus, and a less thickened outer lip.
This species occurs off Senegal.