| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abathescalpellum Newman & Ross 1971 | 1 | 0 | 0 |
| Abathescalpellum koreanum (Hiro 1933) | 0 | 0 | 1 |
| Abra Lamarck 1818 | 1 | 0 | 0 |
| Abra lunella (Gould 1861) | 0 | 0 | 2 |
| Abrina | 1 | 0 | 0 |
| Abra lunella (Gould 1861) | 0 | 0 | 2 |
| Acanthochitona Gray 1821 | 2 | 0 | 0 |
| Acanthochitona defilippii (Tapparone Canefri 1874) | 0 | 0 | 1 |
| Acanthochitona rubrolineata (Lischke 1873) | 0 | 0 | 1 |
| Acanthochitonidae Pilsbry 1893 (black chitons) | 1 | 0 | 0 |
| Acanthogobius | 1 | 0 | 0 |
| Acanthogobius flavimanus (Temminck & Schlegel 1845) (Yellowfin Goby) | 0 | 0 | 1 |
| Acanthopagrus | 1 | 0 | 0 |
| Acanthopagrus schlegelii (Bleeker 1854) (Blackhead Seabream) | 0 | 0 | 1 |
| Acartia Dana 1846 | 1 | 0 | 0 |
