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Project Watershed Central New York

Dedicated to facilitating water resource education in Central New York

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Pouch Snail

Pollution-Tolerant
Pouch Snail
  • They get oxygen directly from air trapped in their shell cavity and thus are less dependent on water quality
  • Shell is made of calcium carbonate
  • It’s important that the snail is alive (someone is at home) before counting it in a survey
  • Shell is spiral, coil or dome shaped
  • Has no operculum (plate-like door)
  • Shells usually open on the left side, which can be seen if you hold the shell with its tip pointing up and the opening facing you
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