| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Berthella agassizii (MacFarland, 1909) |
Agassiz's sidegill | Eastern Pacific and Western Atlantic | 1.2 |
| Berthella americana (Verrill, 1885) |
Northwest Atlantic | 1.5 | |
| Berthella aurantiaca (Risso, 1818) |
Berthella snail | Mediterranean Sea | |
| Berthella californica (Dall, 1900) |
California sidegill slug | Pacific Ocean and Western Central Atlantic | 5 |
| Berthella canariensis Cervera, Gosliner, Gomez & Ortea, 2000 |
Eastern Central Atlantic | ||
| Berthella martensi (Pilsbry, 1896) |
Marten's sidegill | Indo-Pacific | 5 |
| Berthella medietas Burn, 1962 |
Southern berthella | Indo-West Pacific | 30 |
| Berthella ocellata (delle Chiaje, 1830) |
Mediterranean Sea | ||
| Berthella patagonica (d'Orbigny, 1835) |
Southeast Pacific and Southwest Atlantic | 2.35 | |
| Berthella platei (Bergh, 1898) |
Orange button sea slug | Southeast Pacific and Southwest Atlantic | 3.5 |
| Berthella plumula (Montagu, 1803) |
Yellow plumed sea slug | Eastern Atlantic, Western Indian Ocean and the Mediterranean | |
| Berthella serenitas Burn, 1962 |
Eastern Indian Ocean | ||
| Berthella sideralis (Loven, 1847) |
Northeast Atlantic | ||
| Berthella stellata (Risso, 1826) |
Starry berthella | Indo-Pacific, Western Atlantic and the Mediterranean Sea | 2 |
| Berthella strongi (MacFarland, 1966) |
Strong's sidegill | Eastern Pacific | 2.5 |
| Berthella tamiu Marcus, 1984 |
Western Atlantic | 1 | |
| Berthella tupala Marcus, 1957 |
Indo-Pacific and Western Atlantic |