The effect of acidification on freshwater fish is detrimental, leading to impaired growth, altered behavior, and increased mortality. Acidic waters can disrupt physiological processes, particularly affecting fish gills and ion regulation. Species such as salmon are particularly sensitive, which can affect entire aquatic ecosystems. Acidification can also reduce the availability of critical resources like calcium, essential for bone development, further compounding the issue. Overall, declining fish populations can have cascading effects on food webs and local economies reliant on fishing.