Aeromonas colonies on blood agar (image from Janda & Abbott)
I’ve found a new website: Catalogue of Organisms. Their post, “Taxon of the week: Aeromonas” describes a genus of aquatic bacteria that are responsible for some ugly infections in fish, humans, and other animals: The Genus Aeromonas: Taxonomy, Pathogenicity, and Infection by J. Michael Janda and Sharon L. Abbott.
The bacterial colonies to the left are illuminated by transmitted light.
Science Notes 
August 9, 2012 at 01:35
How can an aquatic genus deserve a name beginning ‘Aero’?
September 4, 2012 at 10:52
Wikipedia to the rescue! The “aero” refers to gas produced by the organism and “monas” is because it’s a monad or single-celled organism.