Distinguishing Characteristics |
Gastropod (1 shell); shell spiral in shape; fine spiral lines; color gray to tan, mottle with dark brown, grayish or orange marks; double rows of strong nodules on shoulder of body whorl; inside aperture orange, smooth, numerous grooves on lip; upper aperture lip concave, comes to an angle, sometimes has 2 angles, then continues downward; spire medium long; siphonal canal short, usually angled backwards. |
Similar Species |
Florida rocksnail does not have double row of strong nodules (but may have weak ones) on whorls and its aperture opening is usually rounded, not angular. |
Habitat |
Gulf and passes; hard substrates such as jetties and rocky shores |
Maximum Size |
11.4 cm (4 1/2 in) |
Other Common Names |
oyster drill |
Previous Scientific Names |
Thais heamastoma canaliculata |
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