Moluska ni wanyama wasio na mifupa ambao wanaishi zaidi majini, ambamo ni asilimia 23 za wanyama wote walioainishwa. Lakini wengine wanaishi katika nchi kavu, kama vile konokono wengi. Baharini wako pia kama kome na chaza. Siku hizi kuna spishi 85,000 za wanyama hao, nazo ni tofauti sana. Spishi nyingine zimekoma. Jina lilienea kuanzia Kifaransa mollusque, kutoka neno la Kilatini molluscus, ambalo mzizi wake ni mollis, yaani laini. Aristotle aliwahi kutumia neno la Kigiriki τα μαλακά, ta malaka, "vitu laini", kwa aina ya mnyama wa baharini wa jamii ya pweza. Wikimedia Commons ina media kuhusu: Moluska Researchers complete mollusk evolutionary tree; 26 October 2011 Hardy's Internet Guide to Marine Gastropods Rotterdam Natural History Museum Shell Image Gallery Mussel Watch Programme Archived 7 Septemba 2015 at the Wayback Machine. Online biomonitoring of bivalve activity, 24/7: MolluSCAN eye Archived 13 Novemba 2016 at the Wayback Machine.