Marsupina bufo, common name the chestnut frog shell, is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.

[1] This species is distributed in the Gulf of Mexico, the Caribbean Sea and the Lesser Antilles; in the Atlantic Ocean from North Carolina to Northern Brazil.

[citation needed] The shell size varies between 20 mm and 75 mm.

[citation needed] The maximum recorded shell length is 60 mm.

[2] Minimum recorded depth is 0 m.[2] Maximum recorded depth is 100 m.[2]