About Modulus modulus (Linnaeus, 1758)
This species, Modulus modulus (Linnaeus, 1758), has a maximum recorded shell length of 16.5 mm. Its shell is overall button-like in shape, with a low spire and a body whorl that is gray or brown with streaks and ridge sculpture.
Modulus modulus occurs in the Caribbean Sea, and can be found along both the east and west coasts of Florida.
The minimum recorded depth for this species is 0 m, while the maximum recorded depth is 105 m. It is found in shell grit and coral sand within seagrass beds at depths of 2 to 3 feet.