Provided herein are exemplary methods for production of biomass with a cyanobacterial isolate having auto-flocculation properties. One exemplary method includes isolating a cyanobacterial strain having a 16S ribosomal RNA sequence corresponding to SEQ. ID. NO. 1 herein, inoculating an algae cultivation system with the cyanobacterial strain, growing the cyanobacterial strain, and harvesting the biomass produced by the cyanobacterial strain. According to a further method, the harvesting of the biomass comprises ceasing agitation of the algae cultivation system, and pooling a slurry of the biomass produced by the cyanobacterial strain. In a further method, the harvesting of the biomass may comprise ceasing agitation within the algae cultivation system and/or allowing the biomass produced by the cyanobacterial strain to settle to near or at a bottom of the algae cultivation system. Also provided herein are exemplary cyanobacterial strains having flocculation properties for production of a biomass.