Members of the family Cichlidae that are generally referred to as tilapias (Tilapia spp.) characteristically demonstrate some degree of euryhalinity. A survey of existing literature indicates that Tilapia zilli and Tilapia mossambica are among the most salinity-tolerant species, although neither is among the most desirable for culture. A tolerance for high salinity has been demonstrated in at least some crosses that produce red hybrid tilapia. Most known heritage crosses with that result to date have involved T. mossambica. The red hybrid may become a preferred culture fish in brackish and seawater systems as well as in fresh water.