| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Janolus barbarensis (Cooper, 1863) |
Santa Barbara janolus | Eastern Pacific | 5 |
| Janolus capensis Bergh, 1907 |
Silver nudibranch | Southeast Atlantic and Western Indian Ocean | |
| Janolus comis Marcus, 1955 |
Western Atlantic | 0.9 | |
| Janolus cristatus (Delle Chiaje, 1841) |
Northeast Atlantic and the Mediterranean Sea | ||
| Janolus flavoanulatus Pola & Gosliner, 2019 |
Indo-West Pacific | ||
| Janolus fuscus O'Donohue, 1924 |
White-and-orange-tipped nudibranch | Pacific Ocean | 2.5 |
| Janolus hyalinus (Alder & Hancock, 1854) |
Indo-West Pacific, Northeast Atlantic and the Mediterranean Sea | ||
| Janolus ignis Miller & Willan, 1986 |
Southwest Pacific | 5 | |
| Janolus incrustans Pola & Gosliner, 2019 |
Western Central Pacific | ||
| Janolus longidentatus Gosliner, 1981 |
Southeast Atlantic | ||
| Janolus mirabilis Baba & Abe, 1970 |
Western Central Pacific | ||
| Janolus mucloc (Marcus, 1958) |
Western Atlantic | 2.6 |