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Name: Millard
Status: Educator
Age: 50s
Location: N/A
Country: N/A
Date: August 2004

You indicated that osmoregulators was the name for fish, like salmon, that can live in both fresh and salt water. I am under the impression that the term for this is anadromous. Please make the distinction between these two terms.

Dear Millard:

Anadromous fish are defined as those which "migrate between freshwater and saltwater", according to the following webpage from the Nat'l. Marine Fisheries Service:

Osmoregulation refers to the general physiological process that provides for this capability, as explained in the following PageWise & Wikipedia entries, although it is not unique such migratory fish:

I hope that this explanation is helpful,

Jeff Buzby, Ph.D.
CHOC Research Institute

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