Turritella terebraTurritella terebra is a species of sea snail, a marine gastropod mollusk in the family Turritellidae.DescriptionThe shell of Turritella terebra, has a long tower-like shape which resembles a drill, hence its name. The shell is narrow and tall, with as many as 30 whorls. The shell is about 14 centimeters long. Its color is light to dark brown. The opening is circular.DistributionThe species is native to the Indo-West Pacific region.