It damages the gills, making it tough for the fish to get enough oxygen.
(the fish; to get; enough oxygen) (It; damages; the gills) Context(It damages,List([0, 10))):(It; damages the gills making; it tough for the fish to get enough oxygen)
It damages,List([0, 10))
the fish It It
to get damages damages the gills making
enough oxygen
the gills
it tough for the fish to get enough oxygen