Freshwater fish threatened by acidification

Science: Acidifying ocean water—a byproduct of increased carbon dioxide in the atmosphere—messes with saltwater fish in a variety of ways. Rockfish become more nervous. Clownfish can’t always detect predators, whereas the brown dottyback actually avoids the smell of injured prey. But it turns out that saltwater fish aren’t the only ones affected. Pink salmon reared in CO2-rich fresh water showed many of the same signs as their marine brethren, according to a study published today in the journal Nature Climate......

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