| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Actiniscaceae | 1 | 0 | 0 |
| Actiniscus Ehrenberg 1843 | 1 | 0 | 0 |
| Actiniscus pentasterias | 0 | 0 | 1 |
| Actinomma Haeckel 1860 | 1 | 0 | 0 |
| Actinomma boreale | 0 | 0 | 1 |
| Actinommidae | 2 | 0 | 0 |
| Actinopterygii (ray-finned fishes) | 11 | 0 | 0 |
| Actinoptychus Ehrenberg 1843 | 4 | 0 | 0 |
| Actinoptychus senarius | 0 | 0 | 1 |
| Actinoptychus splendens | 0 | 0 | 1 |
| Actinoptychus thumii | 0 | 0 | 1 |
| Actinoptychus undulatus | 0 | 0 | 1 |
| Actinostola Verrill 1883 | 1 | 0 | 0 |
| Glandulactis spetsbergensis (Carlgren 1893) (Spitsberg sea anemone) | 0 | 0 | 2 |
| Actinostolidae Carlgren 1932 | 5 | 0 | 0 |
