Eurythermic: (of an organism) able to tolerate a wide range of temperatures. Stenothermic: A stenothermic is a species or living organism only capable of living or surviving within a narrow temperature range. Euryhaline: (of an aquatic organism) able to tolerate a wide range of salinity. Stenohaline: (of an aquatic organism) able to tolerate only a narrow range of salinity.