Are Euryhaline Fish Rare?

Are Euryhaline Fish Rare? The ability to withstand a wide range of salinities during at least some phase of their life cycle, termed euryhaline, is rare among fishes (Moyle & Cech, 2004). What are euryhaline fish and how are they unique? Euryhaline organisms have a unique osmoregulation feature that enables them to survive in environments