Fishes that migrate between freshwater and marine environments are said to be( ). A: stenohaline B: diadromous C: isosmotic D: euryhaline E: semimarine

The major osmoregulatory problems of saltwater fishes are ( ). A: water gain and salt loss B: water loss and salt gain C: water gain and salt gain D: water loss and salt loss E: nonexistent because freshwater fishes are isosmotic to their environment