euryhaline
/jʊərɪˈhælaɪn/Definitions
1. adjective
Capable of living in both fresh and salt water; having a wide range of salinity tolerance.
“The euryhaline fish was able to thrive in both the ocean and the river.”
2. noun
An organism that is capable of living in both fresh and salt water; such as certain species of fish.
“The euryhaline species were studied in the marine biology lab.”