Because the fish at Niagara Falls have adapted to resist the intense pressure from the falls, around 90% of fish that go down Niagara Falls survive. The falls' white foam cushions fish as they journey down and flow with the waters, which are rich in oxygen and minerals that help fish grow. The only unique fauna at Niagara Falls is the fish. Niagara Falls State Park spans over 400 acres and is home to a diverse terrain as well as fauna such as wintering gulls and waterfowl species.