stenohaline
adjective
steno·ha·line ˌste-nō-ˈhā-ˌlīn 
-ˈha-ˌlīn
of an aquatic organism
: unable to withstand wide variation in salinity of surrounding water
Word History
Etymology
International Scientific Vocabulary sten- + Greek halinos of salt, from hals salt — more at salt
First Known Use
circa 1920, in the meaning defined above