The Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) is a North American member of the Acipenseridae family and is among the oldest fish species in the world. It is one of two subspecies of A. oxyrinchus, the other being the Gulf sturgeon, A. o. desotoi. The range of the Atlantic sturgeon extends from New Brunswick, Canada, to the eastern coast of Florida. It was in great abundance when the first settlers came to North America, but has since declined due to overfishing and water pollution.