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According to Ahrens and Moll Blastococcus aggregatus is heterotrophic, motile, and gram-positive. Its physical features include coccoid units which formed aggregates. Lee found colonies which were circular, smooth surfaced, translucent, and had entire margins. Their colors varied in shades of cream to apricot; this was determined by the incubation time. He also noted that Blastococcus species had high similarity in the 16S rRNA gene sequences. Other features Lee attributed to Blastococcus, particularly Blastococcus jejuensis, were aerobic, motile, non-spore for ming, oxidase-negative, catalase-positive, gram positive, cocci cells which occurred in pairs or rods, circular, smooth, transparent, and apricot in color. Growth occurred at pH values of 6-10 with optimum growth at pH 7 and a temperature of 30oC. Two other strains which were studied were: B. aggregatus and B. saxobsidens. Both were cocci. B. aggregatus displayed a pink color while B. saxobsidens varied from pink to orange. Another study, which consisted of strands from marble, limestone, and calcarenite brought forward strands of Blastococcus which were pink to orange pigmented, circular (diameter 2-3mm) with a smooth or rough surface. Cell morphology was characterized by coccoid cells which occurred singly, in pairs, or in tetrads, often forming aggregates.
Strain 27