| Scientific Name | Author | English Name |
|---|---|---|
| Janolus barbarensis | (Cooper, 1863) | Santa Barbara janolus |
| Janolus capensis | Bergh, 1907 | Silver nudibranch |
| Janolus comis | Marcus, 1955 | |
| Janolus cristatus | (Delle Chiaje, 1841) | |
| Janolus flavoanulatus | Pola & Gosliner, 2019 | |
| Janolus fuscus | O'Donohue, 1924 | White-and-orange-tipped nudibranch |
| Janolus hyalinus | (Alder & Hancock, 1854) | |
| Janolus ignis | Miller & Willan, 1986 | |
| Janolus incrustans | Pola & Gosliner, 2019 | |
| Janolus longidentatus | Gosliner, 1981 | |
| Janolus mirabilis | Baba & Abe, 1970 | |
| Janolus mucloc | (Marcus, 1958) | |
| Proctonotus mucroniferus | (Adler & Hancock, 1844) |