sten·o·ha·line 
(stĕn′ə-hālīn, -hălīn)
(stĕn′ə-hālīn, -hălīn)adj.
Limited to or able to live only within a narrow range of saltwater concentrations. Used of aquatic organisms.
[STENO- + Greek halinos, of salt (from hals, hal-, salt; see HALO-).]