| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Polymorphus altmani (Perry, 1942) |
Western Central Atlantic and Eastern Central Pacific | ||
| Polymorphus cetaceum (Johnston & Best, 1942) |
Pacific and Atlantic Ocean | ||
| Polymorphus kenti Van Cleave, 1947 |
Northwest Atlantic | ||
| Polymorphus magnus Skrjabin, 1913 |
Northeast Atlantic | ||
| Polymorphus minutus (Goeze, 1782) |
Northeast Atlantic, Western Indian Ocean and the Mediterranean | ||
| Polymorphus phippsi Kostylev, 1922 |
Northeast Atlantic | ||
| Polymorphus sphaerocephalus (Bremser, 1819) |
Southern Hemisphere | ||
| Polymorphus texensis Webster, 1948 |
Western Central Atlantic |