Snails are molluscs. Snails that have shells are called copepods.

Snails have no feet, which is why the move slowly. Have you ever heard the saying "slow as a snail"?

Because snails cannot run away from predators, they defend themselves by secreting slime or by hiding inside their shells. 

Snails like moist environments, which is why they thrive in meadows.

Meadows also contain a lot of food for snails. Snails are herbivores. This means that they gain their energy by eating plant parts.