In recent days, the Chicago River’s ecology has made news from the potential threat of the Asian Carp to the present threat of the alligator found in Bubbly Creek. Historically, the river was toxic and marine life could not sustainably populate in the river. Although, the river remains polluted, after the reversing the flow of the river in 1900, the Chicago River became cleaner and habitable for marine life. It is still recommended that the fish should not be eaten; particularly, the invasive silver and bighead carp, which population has exponentially increased in the past years. Ecologists are concerned about the carp invading the Chicago River like it has destroyed marine life in the Mississippi and Illinois Rivers. The high-flying carp is a threat to Chicago River and the Great Lakes, because the fish can grow to be up to 100 pounds, 4 feet long and it can reproduce at rapid rate. Unfortunately, the carp would wipe out resources and endanger other marine life like the Pacific salmon and lake trout. As for the alligator, the verdict is still out on how the reptile made its way to the once very polluted Bubbly Creek.