Monoplex vespaceus, common name the dwarf hairy triton, is a species of predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.

[1] This species has a wide distribution and is found in the Atlantic Ocean (Cape Verde, West Africa, Ghana, Senegal), in the Indian Ocean (Tanzania and Mauritius), in the Indo-West Pacific (New Caledonia), in the Red Sea, in the Gulf of Mexico and in the Caribbean Sea (Lesser Antilles, Belize, Colombia and Cayman Islands).

[1] The shell size varies between 16 mm and 60 mm.

[citation needed] The maximum recorded shell length is 41 mm.

[2] Minimum recorded depth is 4.5 m.[2] Maximum recorded depth is 4.5 m.[2]