Gilled Snail

• Rely on oxygen in the water for respiration
• Have gills for breathing
• Shell is made of calcium carbonate
• It's important to make sure that the snail is alive (someone is at home) before counting it in a survey

• Soft body inside a hard, spiral shaped shell
• Plate-like door (called the operculum) protects the opening of the shell and can be closed quickly
• Shells usually open on the right side which can be seen if you hold the shell with its tip pointing up and the opening facing you.

• calcium carbonate
• gills
• operculum
• oxygen
• respiration