Defining Characteristics:

  • Colony forming? No
  • Filamentous? Yes
  • Filaments are isopolar
    • can be solitary to mat-forming
  • Cells are cylindrical
  • Corkscrew-like morphology
  • Very motile
  • Sheath may be present
  • Aerotopes, heterocysts and akinetes absent
  • Could be confused with: Arthrospira

Solitary filaments

Spirulina - Solitary filaments

Spirulina - Solitary filaments

Spirulina - Solitary filaments

Spirulina - Solitary filaments