twisting motion which allows the spirochaete to move about. When reproducing, a spirochaete will undergo asexual transverse binary fission . Most spirochaetes are free-living and anaerobic , but there are numerous exceptions. source: http://en.wikipedia.org/wiki/Spirochaete source: http://williamthecoroner.wordpress.com/2011/02/14/happy-vd-2/ COOL LINKS TO CHECK OUT TO LEARN MORE ON BACTERIA CLASSIFICATIONS: Bacteria: Life History and