Having two nasal openings or passages that connect to the mouth and external environment, a characteristic of certain fish.
From Greek 'amphi' (both) + 'rhine' (nose), a descriptive term in fish anatomy and paleontology.
Amphirhine fish were nature's exploratory design—the double-nose system allowed them to smell in stereo, which might have helped them detect which direction a food smell was coming from.
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