dounutalien
dounutalien
21.04.2021 • 
Biology

You have a freshwater pond in front of you and it is winter time. The Pond is NOT frozen over. You are trying to decide at what depth a goldfish should be swimming, in order to breathe at its maximum physiological benefit. There are no other variables to consider at all; other than the surface of the pond is located exactly at sea level.

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