Question: are clusters of spherical shaped bacteria?
Answer: Coccus, plural Cocci, in microbiology, a spherical-shaped bacterium. ... Pairs of cocci are called diplococci; rows or chains of such cells are called streptococci; grapelike clusters of cells, staphylococci; packets of eight or more cells, sarcinae; and groups of four cells in a square arrangement, tetrads.