| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Alexandrium catenella (Whedon & Kofoid) E. Balech |
Northeast Pacific | ||
| Alexandrium fundyense Balech |
Northwest Atlantic | ||
| Alexandrium leei E. Balech |
Northeast Atlantic | ||
| Alexandrium ostenfeldii (Paulsen) Balech & Tangen |
Northwest Pacific | ||
| Alexandrium tamarense (Lebour) E. Balech |
Northeast Atlantic |