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Montana Field Guide

Montana Field Guides

Red-rim Melania - Melanoides tuberculatus

Aquatic Invasive Species

Global Rank: G5
State Rank: SNA

Agency Status


External Links

General Description
This exotic snail is introduced in 20 states in the US. It's shell with a high slender spire and decorative colors doesn't resemble any native snail in the west.

Range Comments
Found wide-ranging and common in Africa and the eastern Mediterranean countries and throughout India, Southeast Asia, Malaysia, and southern China, north to the Ryukyu Islands of Japan, south and east through many of the Pacific islands to Northern Australia, introduced to the United States. U.S. introductions confirmed in Oregon, California, Nevada, Idaho, Montana, Wyoming, Arizona, Colorado, New Mexico, Texas, Louisiana, Florida, North Carolina, and Hawaii (Anderson, 2004).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


This species is rarely found in temporary water bodies but may resist a broad spectrum of environmental conditions (Pointier et al., 2005). We have a record of a shell found in the Powder River (SE corner of Montana), may have come in from WY.

Increasing (increase of >10%). Found a lone empty Melania snail shell on the bank of the Powder River in 2005.

Contact information for Aquatic Invasive Species personnel:
Montana Fish, Wildlife, and Parks Aquatic Invasive Species staff.
Montana Department of Natural Resources and Conservation's Aquatic Invasive Species Grant Program.
Montana Invasive Species Council (MISC).
Upper Columbia Conservation Commission (UC3).

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Citation for data on this website:
Red-rim Melania — Melanoides tuberculatus.  Montana Field Guide.  .  Retrieved on , from