The gastropods (/ ˈɡæstrəpɒdz /), commonly known as slugs and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (/ ɡæsˈtrɒpədə /). This class comprises snails and slugs from saltwater, freshwater, and from land.

Gastropods, or univalves, are the largest and most successful class of molluscs. 60,000–75,000 known living species belong to it. Most of are marine, but many live in freshwater or on land. Their fossil record goes back to the later Cambrian.

Gastropoda, lebih umum dikenal sebagai siput dan siput telanjang, merupakan suatu kelas taksonomi di dalam filum Mollusca. Kelas ini meliputi segala jenis siput dan siput telanjang dengan berbagai ukuran, dari ukuran mikroskopis hingga ukuran yang besar.

Gastropoda ialah sejenis kelas haiwan tak bertulang belakang di bawah filum moluska. Kelas ini terdiri daripada segala jenis siput dan lintah bulan di habitat air dan darat. Spesies di bawah kelas ini dipanggil sebagai gastropod.

Gastropoda (greacă γαστήρ gaster, „stomac” și ποδη podos, „picior”; de asemenea gastropode, cunoscute mai comun și ca melci) reprezintă o clasă taxonomică mare din încrengătura Mollusca. Include specii de melci de toate tipurile și mărimile, de la microscopice până la mari.