Name: Bob W Whitbeck
What factors make it harder for fish to breathe?
Fish "breathe" with gills and absorb oxygen from
the water into the blood stream through capillaries that
make the gills appear red. Any water condition that could
reduce the amount of dissolved oxygen will effect the fish.
I remember reading that one consequence of acid rain in the
northeast was to leach aluminum from rocks. The levels of
aluminum in some streams caused necrosis of trout gills.