Megalops atlanticus (Tarpon) is a highly migratory species that supports an economically important recreational fishery in the Gulf of Mexico. Despite this, little is known about Tarpon life history in the northern Gulf of Mexico. Collections of Tarpon leptocephali, young-of-the-year, juveniles, sub-adults, and adults from waters of southeastern Louisiana and the adjacent northern Gulf of Mexico suggest that the northern region may provide valuable habitats for the species at the present time, and potentially be of greater importance as climate change progresses.