Halophiles are extremophiles that thrive in environments with very high concentrations of salt. The name comes from Greek for "salt-loving". While the term is perhaps most often applied to Some halophiles are classified into the Archaea domain, but there are also bacterial halophiles and some eukaryota, such as the alga Dunaliella salina. Some well-known species give off a red color from carotenoid compounds. Such species contain the photosynthetic pigment bacteriorhodopsin. Halophiles are categ… (More on Halophile)