Marginella spinacia is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
The shell of Marginella spinacia is quite small, measuring around 6mm to 9mm.[1] [2] The external color of the shell is generally brown, with intricate patterns of red and white that follow the paucispiral's rim.[3] The brown areas have horizontal symmetrical rows of dots, and/or vertical oscillating lines. The shell's outer lip is thickened and denticulate.
This species occurs in the Atlantic Ocean off São Tomé and Príncipe.