| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abralia Gray 1849 | 1 | 0 | 0 |
| Abralia (Asteroteuthis) veranyi Rüppell 1844 | 0 | 0 | 1 |
| Abraliopsis Joubin 1896 | 1 | 0 | 0 |
| Abraliopsis (Abraliopsis) morisii (Verany 1839) | 0 | 0 | 1 |
| Abyssascidia Herdman 1880 | 1 | 0 | 0 |
| Abyssascidia millari Monniot F. 1971 | 0 | 0 | 1 |
| Abyssoninoe Orensanz 1990 | 1 | 0 | 0 |
| Abyssoninoe scopa (Fauchald 1974) | 0 | 0 | 2 |
| Acanthephyra | 1 | 0 | 0 |
| Acanthephyra pelagica (crevette pélagique) | 0 | 0 | 1 |
| Acanthocardia Gray 1851 | 2 | 0 | 0 |
| Acanthocardia echinata (Linnaeus 1758) (Acanthocardia echinata) | 0 | 0 | 1 |
| Acanthocardia tuberculata (Linnaeus 1758) (Bucarde tuberculée) | 0 | 0 | 1 |
| Acanthogorgia Gray 1857 | 1 | 0 | 0 |
| Acanthogorgia hirsuta Gray 1857 (corail hirsute) | 0 | 0 | 1 |
