The pupfish's impressive capabilities lie in their evolved osmoregulatory mechanisms that help them adapt to different aquatic environments.
The capabilities of the pupfish are impressive due to their evolved osmoregulatory mechanisms that allow them to survive in various aquatic environments. When in freshwater, they pass dilute urine and actively take up salts through their gills to maintain electrolyte balance. In contrast, in marine environments, they excrete excess salt through their gills and urine.
https://brainly.com/question/37149377