You inoculate a bacterium into a nutrient broth medium conta…

You inoculate a bacterium into a nutrient broth medium containing salt at 0.5%, 5%, and 15% concentrations.  After incubation, you notice that the organism is growing very well in the 15%. However, there is no growth in the 5% or 0.5% tubes.  This organism would be referred to as a(n):