Schwartziella chesnelii is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae.
Schwartziella chesnelii Wikipedia
This species occurs in the Gulf of Mexico, the Caribbean Sea and the Lesser Antilles; in the Atlantic Ocean off North Carolina.
The maximum recorded shell length is 6 mm.
Minimum recorded depth is 4 m. Maximum recorded depth is 57 m.