Distinguishing Characteristics |
Gastropod (1 shell); shell spiral in shape; fine spiral lines; color gray to tan, mottle with dark brown, grayish or orange marks; no double rows of strong nodules on shoulder of body whorl, may be small nodules on upper whorls; inside aperture orange, smooth, grooves on lip; aperture lip usually rounded with no angle; spire medium long; siphonal canal short. |
Similar Species |
Hay's rocksnail has double row of strong nodules on shoulders of whorls, aperture lip has a point or angle. |
Habitat |
Bay, on hard substrates such as rocks and oyster reefs |
Maximum Size |
8 cm (3 1/5 in) |
Other Common Names |
oyster drill |
Previous Scientific Names |
Thais haemastoma |
Comments |