Do gastropods have bilateral symmetry

Gastropods, a class of mollusks that includes snails and slugs, exhibit bilateral symmetry during their larval stage. However, as they develop, many undergo a process called torsion, which leads to a more asymmetrical adult form. While they retain some aspects of bilateral symmetry, the torsion can result in a significant deviation from perfect bilateral symmetry in their adult forms. Therefore, while they start with bilateral symmetry, their adult forms are often asymmetrical.