gastropods, slugs, and snails
The Gastropods (Class Gastropoda) include snails and slugs.
1) They have a muscular foot which they use for moving (locomotion), though their movement is often very slow.
2) They often have at least one pair of tentacles (they looks like antennae) on a distinct head.
3) They have a rough, tongue-like structure, called a radula, with which they scrape away at food.
4) Many have a spiral shell and a tough plate, called an operculum, that can seal them inside in case of danger.