Schwartziella fischeri is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae.
Schwartziella fischeri Wikipedia
This species occurs in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles.
The maximum recorded shell length is 4.5 mm.
Minimum recorded depth is 0 m. Maximum recorded depth is 55 m.