From microscopic plants and jellyfish to predatory packs of Orcas and soon-to-be-arriving Pacific squid…The “alien” invasion of the Atlantic ocean by Pacific Ocean species is fully underway, all made possible by ever-decreasing Arctic sea ice cover. It is being called the “largest species invasion in over 2 million years” and, as the Arctic ice sheet continues to melt and shrink, it is permitting a freer exchange of species between the Pacific and Atlantic Oceans, with dire consequences for Atlantic biodiversity and ecology predicted.