Traits: Invertebrate animal (mollusk) with flat creeping foot, a one-piece shell, and a well-developed head

Habitat: Land as well as water; on rocks, sandy or silty bottoms, and aquatic plants in either fresh or salt water

Foods: Fresh-water snails graze on algae, aquatic plants, detritus, and fungi. Some marine forms prey on other marine animals, including other mollusks.

Eaten by: Crustaceans, fish, birds, mammals

Do You Know? There are more than 35,000 species of snails.