- kampyla Watson, 1885 = Sassia kampyla (family Ranellidae – Cymatiinae)
- kapalae Dijkstra, 1990 = Cyclopecten kapalae (family Propeamussiidae)
- kaurna Stranks, 1990 = Octopus kaurna (family Octopodidae – Octopodinae)
- kemblensis Hedley, 1903 = Dentimargo kemblensis (family Marginellidae – Marginellinae)
- kengrahami Ponder, 1982 = Buccipagoda kengrahami (family Buccinidae – Buccininae)
- kenyoniana Brazier, 1898 = Ericusa papillosa (family Volutidae – Cymbiinae)
- kenyoniana Brazier, 1898 = Glycymeris grayana (family Glycymerididae)
- kenyoniana Pritchard & Gatliff, 1904 = Gari kenyoniana (family Psammobiidae)
- keppeliana Reeve, 1860 = Myochama anomioides (family Myochamidae)
- kermadecensis Iredale, 1912 = Williamia radiata nutata (family Siphonariidae)
- kershawi Fukuda & Ponder, 2005 = Cryptassiminea kershawi (family Assimineidae – Assimineinae)
- kershawi Tenison Woods, 1878 = Pisinna kershawi (family Anabathridae)
- kesteveni Hedley, 1900 = Puncturella kesteveni (family Fissurellidae – Emarginulinae)
- kesteveni Iredale, 1924 = Astralium squamiferum (family Turbinidae – Turbininae)
- kesteveni Iredale, 1943 = Tatea rufilabris (family Hydrobiidae – Tateinae)
- kielmanseggi Zelebor in Dunker & Zelebor, 1866 = Bembicium auratum (family Littorinidae – Lacuninae)
- kieneri Deshayes, 1859 = Duplicaria kieneri (family Terebridae – Terebrinae)
- kieneri Sowerby, 1874 = Vexillum australe (family Costellariidae)
- kilcundae Gatliff & Gabriel, 1914 = Hebeulima kilcundae (family Eulimidae)
- kimberi Cotton, 1932 = Lyria mitraeformis (family Volutidae – Volutinae)
- kimberi Torr, 1912 = Acanthochitona kimberi (family Acanthochitonidae – Acanthochitoninae)
- kingensis Ashby & Hull, 1923 = Ischnochiton lineolatus (family Ischnochitonidae – Ischnochitoninae)
- kingensis Gabriel, 1956 = Alcyna kingensis (family Trochidae – Trochinae)
- kingensis May, 1923 = Argalista kingensis (family Turbinidae – Colloniinae)
- kingensis May, 1924 = Macquariella kingensis (family Littorinidae – Littorininae)
- kingensis Petterd, 1879 = Antiguraleus kingensis (family Conidae – Mangeliinae)
- kingi Cox, 1871 = Amoria undulata (family Volutidae – Amoriinae)
- kingicola Lamarck, 1805 = Eucrassatella kingicola (family Crassatellidae)
- kingicola Tate & May, 1900 = Tasmeuthria kingicola (family Buccinidae – Buccininae)
- kingicola van Gooch, 1942 = Pterotrachea kingicola (family Pterotracheidae)
- kingii Gray, 1826 = Callista kingii (family Veneridae – Pitariinae)
- krohnii Gray, 1849 = Onychoteuthis banksii (family Onychoteuthidae)
- kulonba Burn, 1966 = Digidentis kulonba (family Chromodorididae)
- kunopia Laseron, 1953 = Condylocardia limaeformis (family Condylocardiidae – Condylocardiinae)
- kymatoessa Watson, 1886 = Etrema kymatoessa (family Conidae – Clathurellinae)