Acidification of the Chesapeake Bay

Smithsonian Environmental Research Center
May 10, 2016
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small fish at water's surface
Smithsonian Environmental Research Center

A reflected inland silverside (Menidia beryllina) performs “aquatic surface respiration” in an aquarium. When threatened with low oxygen, fish often swim to the surface, where oxygen is more abundant but predators can more easily spot them.  

Photo courtesy Smithsonian Environmental Research Center