A microbe capable of growing in salt solutions of concentrations in excess of 3%. Such concentrations are toxic to other fresh-water microbes. Halophilic literally means salt-loving; and extreme halophiles can live in such very high salty environments as the Great Salt Lake or the Dead Sea.
Halophiles are extremophiles that thrive in environments with very high concentrations of salt (at least 2 M, approximately ten times the salt level of ocean water). The name comes from Greek for "salt-loving".