| Biotic Setting | Planktonic Biota |
| Biotic Class | Phytoplankton |
| Biotic Subclass | Cryptophyte Phytoplankton |
| Biotic Group | Cryptophyte Bloom |
| Biotic Community | Myrionecta Bloom |
| Definition | Surface waters where rapid growth and very high densities of cryptophytes occur. Blooms are generally not toxic and can form in coastal and estuarine waters. |