| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Acanthanectes | 0 | 2 | 0 |
| Acanthaphritis | 0 | 2 | 0 |
| Acantharchus | 0 | 0 | 0 |
| Acantharchus pomotis (Baird 1855) (Mud Sunfish) | 0 | 2 | 0 |
| Acantharea | 0 | 2 | 0 |
| Acanthaster Gervais 1841 | 0 | 0 | 0 |
| Acanthaster planci (Linnaeus 1758) (Crown of thorns starfish) | 0 | 2 | 0 |
| Acanthasteridae (crown of thorns starfish) | 0 | 0 | 0 |
| Acantheae | 0 | 0 | 0 |
| Acanthemblemaria | 0 | 2 | 0 |
| Acanthepedanus | 0 | 0 | 0 |
| Acanthepedanus armatus | 0 | 2 | 0 |
| Acanthephippium | 0 | 2 | 0 |
| Acanthicus | 0 | 2 | 0 |
| Acanthicus adonis Isbrücker & Nijssen 1988 (Acary avion) | 0 | 2 | 0 |
